{"id":6434,"date":"2024-02-14T20:56:48","date_gmt":"2024-02-14T11:56:48","guid":{"rendered":"https:\/\/now0930.pe.kr\/wordpress\/?p=6434"},"modified":"2026-10-24T15:19:42","modified_gmt":"2026-10-24T06:19:42","slug":"%eb%8f%84%ed%94%8c%eb%9f%ac-%ed%9a%a8%ea%b3%bc","status":"publish","type":"post","link":"https:\/\/now0930.pe.kr\/wordpress\/%eb%8f%84%ed%94%8c%eb%9f%ac-%ed%9a%a8%ea%b3%bc\/","title":{"rendered":"\ub3c4\ud50c\ub7ec \ud6a8\uacfc"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\uc8fc\ud30c\uc218 \uce21\uc815 \uc2dc \ub3c4\ud50c\ub7ec \ud6a8\uacfc(Doppler Effect)\uc5d0 \ub300\ud558\uc5ec \uc124\uba85\ud558\uc2dc\uc624<\/p>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/02\/NeoStudio_20251230_190457_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"NeoStudio_20251230_190457_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4 \uae30\uc220\uc0ac 17\uc758 \uc0bd\uc785.\"><\/object><a id=\"wp-block-file--media-7a54b3e0-4d6a-4d0f-a3d7-f1d4411716f4\" href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/02\/NeoStudio_20251230_190457_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17.pdf\">NeoStudio_20251230_190457_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4 \uae30\uc220\uc0ac 17<\/a><a href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/02\/NeoStudio_20251230_190457_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-7a54b3e0-4d6a-4d0f-a3d7-f1d4411716f4\">\ub2e4\uc6b4\ub85c\ub4dc<\/a><\/div>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"\ud2b9\uc218\uc0c1\ub300\uc131\uc774\ub860\uc758 E=mc^2 \uacf5\uc2dd \uc99d\uba85_\uc0c1\ub300\ub860\uc801 \ub3c4\ud50c\ub7ec\ud6a8\uacfc\" width=\"580\" height=\"326\" src=\"https:\/\/www.youtube.com\/embed\/2dBCuKLMYjc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/02\/NeoStudio_20250512_001703_Shine-Orange.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"NeoStudio_20250512_001703_Shine Orange\uc758 \uc0bd\uc785.\"><\/object><a id=\"wp-block-file--media-ea808b11-3e63-49e9-9f8b-8147534c31bc\" href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/02\/NeoStudio_20250512_001703_Shine-Orange.pdf\">NeoStudio_20250512_001703_Shine Orange<\/a><a href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/02\/NeoStudio_20250512_001703_Shine-Orange.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-ea808b11-3e63-49e9-9f8b-8147534c31bc\">\ub2e4\uc6b4\ub85c\ub4dc<\/a><\/div>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/02\/NeoStudio_20260105_173100_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"NeoStudio_20260105_173100_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4 \uae30\uc220\uc0ac 17\uc758 \uc0bd\uc785.\"><\/object><a id=\"wp-block-file--media-6fac8f30-5ecc-4fe5-b2d7-402554161053\" href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/02\/NeoStudio_20260105_173100_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17.pdf\">NeoStudio_20260105_173100_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4 \uae30\uc220\uc0ac 17<\/a><a href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/02\/NeoStudio_20260105_173100_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-6fac8f30-5ecc-4fe5-b2d7-402554161053\">\ub2e4\uc6b4\ub85c\ub4dc<\/a><\/div>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/02\/NeoStudio_20250326_143127_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4_\uae30\uc220\uc0ac14_037_Page.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"NeoStudio_20250326_143127_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4_\uae30\uc220\uc0ac14_037_Page\uc758 \uc0bd\uc785.\"><\/object><a id=\"wp-block-file--media-b44faceb-db83-4f8c-9232-24d046d1e375\" href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/02\/NeoStudio_20250326_143127_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4_\uae30\uc220\uc0ac14_037_Page.pdf\">NeoStudio_20250326_143127_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4_\uae30\uc220\uc0ac14_037_Page<\/a><a href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/02\/NeoStudio_20250326_143127_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4_\uae30\uc220\uc0ac14_037_Page.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-b44faceb-db83-4f8c-9232-24d046d1e375\">\ub2e4\uc6b4\ub85c\ub4dc<\/a><\/div>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-now-0930 wp-block-embed-now-0930\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"oUlFCVRT7R\"><a href=\"https:\/\/now0930.pe.kr\/wordpress\/%ec%9c%a0%ec%86%8d-%ec%b8%a1%ec%a0%95\/\">\uc720\uc18d \uce21\uc815<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u201c\uc720\uc18d \uce21\uc815\u201d \u2014 now0930 \uc77c\uc9c0\" src=\"https:\/\/now0930.pe.kr\/wordpress\/%ec%9c%a0%ec%86%8d-%ec%b8%a1%ec%a0%95\/embed\/#?secret=9UG8lLeCy5#?secret=oUlFCVRT7R\" data-secret=\"oUlFCVRT7R\" width=\"580\" height=\"327\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/m.blog.naver.com\/twonkang00\/222093880659\">https:\/\/m.blog.naver.com\/twonkang00\/222093880659<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ub3c4\ud50c\ub7ec \ud6a8\uacfc: \uad00\ucc30\uc790\uac00 \uc6c0\uc9c1\uc774\ub294 \ubb3c\uccb4\ub97c \ud5a5\ud558\uc5ec \uc804\ud30c\ub97c \ubc1c\uc0ac\ud558\uc600\uc744 \ub54c, \uad00\ucc30\uc790\uc640 \uc6c0\uc9c1\uc774\ub294 \ubb3c\uccb4\uc758 \uc0c1\ub300 \uc18d\ub3c4\uc5d0 \ub530\ub77c \uc8fc\ud30c\uc218\uac00 \ubcc0\uacbd\ub418\ub294 \ud604\uc0c1. \ubb3c\uccb4\uac00 \uad00\ucc30\uc790\ub97c \ud5a5\ud558\uc5ec \ub2e4\uac00\uc62c \uacbd\uc6b0\uc5d0\ub294 \ubc18\uc0ac\ub418\ub294 \uc8fc\ud30c\uc218\uac00 \ub192\uc544\uc9c0\uace0, \ubb3c\uccb4\uac00 \uad00\ucc30\uc790\ub97c \ub5a0\ub098 \uba40\uc5b4\uc9c8 \uacbd\uc6b0\uc5d0\ub294 \ubc18\uc0ac\ub418\ub294 \uc8fc\ud30c\uc218\uac00 \ub0ae\uc544\uc9c4\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc0ac\uc6a9 \uc608\uc2dc: \ucc28\ub7c9\uc758 \uc2a4\ud53c\ub4dc \uac74, \ub808\uc774\ub354<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/ko.wikipedia.org\/wiki\/%EB%8F%84%ED%94%8C%EB%9F%AC_%ED%9A%A8%EA%B3%BC\" target=\"_blank\" rel=\"noreferrer noopener\">\ub3c4\ud50c\ub7ec \ud6a8\uacfc(Doppler Effect)\ub294 \uc5b4\ub5a4 \ud30c\ub3d9\uc758 \ud30c\ub3d9\uc6d0\uacfc \uad00\ucc30\uc790\uc758 \uc0c1\ub300 \uc18d\ub3c4\uc5d0 \ub530\ub77c \uc9c4\ub3d9\uc218\uc640 \ud30c\uc7a5\uc774 \ubc14\ub00c\ub294 \ud604\uc0c1\uc744 \uac00\ub9ac\ud0b5\ub2c8\ub2e4<\/a><a href=\"https:\/\/ko.wikipedia.org\/wiki\/%EB%8F%84%ED%94%8C%EB%9F%AC_%ED%9A%A8%EA%B3%BC\" target=\"_blank\" rel=\"noreferrer noopener\"><sup>1<\/sup><\/a>. <a href=\"https:\/\/ko.wikipedia.org\/wiki\/%EB%8F%84%ED%94%8C%EB%9F%AC_%ED%9A%A8%EA%B3%BC\" target=\"_blank\" rel=\"noreferrer noopener\">\uc774 \ud604\uc0c1\uc740 \uc18c\ub9ac\uc640 \uac19\uc774 \ub9e4\uc9c8\uc744 \ud1b5\ud574 \uc6c0\uc9c1\uc774\ub294 \ud30c\ub3d9\uc5d0\uc11c\ub294 \uad00\ucc30\uc790\uc640 \ud30c\ub3d9\uc6d0\uc758 \ub9e4\uc9c8\uc5d0 \ub300\ud55c \uc0c1\ub300\uc18d\ub3c4\uc5d0 \ub530\ub77c \ud6a8\uacfc\uac00 \ubcc0\ud558\uba70, \ube5b\uc774\ub098 \uc77c\ubc18\uc0c1\ub300\uc131\uc774\ub860\uc5d0\uc11c\uc758 \uc790\uae30\ub825\uacfc \uac19\uc774 \ub9e4\uc9c8\uc774 \ud544\uc694 \uc5c6\ub294 \ud30c\ub3d9\uc758 \uacbd\uc6b0 \uad00\ucc30\uc790\uc640 \ud30c\ub3d9\uc6d0\uc758 \uc0c1\ub300\uc18d\ub3c4\ub9cc\uc774 \ub3c4\ud50c\ub7ec \ud6a8\uacfc\uc5d0 \uc601\ud5a5\uc744 \ubbf8\uce69\ub2c8\ub2e4<\/a><a href=\"https:\/\/ko.wikipedia.org\/wiki\/%EB%8F%84%ED%94%8C%EB%9F%AC_%ED%9A%A8%EA%B3%BC\" target=\"_blank\" rel=\"noreferrer noopener\"><sup>1<\/sup><\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ub3c4\ud50c\ub7ec \ud6a8\uacfc\ub294 \uc8fc\ud30c\uc218 \uce21\uc815\uc5d0 \uc788\uc5b4 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ub808\uc774\ub2e4\ub098 \ub808\uc774\uc800 \uc18d\ub3c4 \uce21\uc815\uae30 \ub4f1\uc5d0\uc11c\ub294 \ub3c4\ud50c\ub7ec \ud6a8\uacfc\ub97c \uc774\uc6a9\ud558\uc5ec \ubb3c\uccb4\uc758 \uc18d\ub3c4\ub97c \uce21\uc815\ud569\ub2c8\ub2e4. <a href=\"https:\/\/ko.wikipedia.org\/wiki\/%EB%8F%84%ED%94%8C%EB%9F%AC_%ED%9A%A8%EA%B3%BC\" target=\"_blank\" rel=\"noreferrer noopener\">\ubb3c\uccb4\uac00 \uad00\ucc30\uc790\uc5d0\uac8c \uc811\uadfc\ud558\uba74 \ud30c\ub3d9\uc758 \uc8fc\ud30c\uc218\ub294 \uc99d\uac00\ud558\uace0, \ubb3c\uccb4\uac00 \uad00\ucc30\uc790\ub85c\ubd80\ud130 \uba40\uc5b4\uc9c0\uba74 \ud30c\ub3d9\uc758 \uc8fc\ud30c\uc218\ub294 \uac10\uc18c\ud558\ub294\ub370, \uc774\ub7ec\ud55c \uc8fc\ud30c\uc218\uc758 \ubcc0\ud654\ub97c \uce21\uc815\ud568\uc73c\ub85c\uc368 \ubb3c\uccb4\uc758 \uc18d\ub3c4\ub97c \uc54c\uc544\ub0bc \uc218 \uc788\uc2b5\ub2c8\ub2e4<\/a><a href=\"https:\/\/ko.wikipedia.org\/wiki\/%EB%8F%84%ED%94%8C%EB%9F%AC_%ED%9A%A8%EA%B3%BC\" target=\"_blank\" rel=\"noreferrer noopener\"><sup>1<\/sup><\/a>.<\/p>\n\n\n\n&#8220;`html\n<div class=\"chapter19-wide\">\n\n  <h1>\ub3c4\ud50c\ub7ec \ud6a8\uacfc<\/h1>\n\n  <div class=\"subtitle\">\n    Doppler Effect \u00b7 Frequency Shift \u00b7 Moving Source \u00b7 Moving Observer \u00b7 Ultrasonic Velocity Measurement\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>1. \ub3c4\ud50c\ub7ec \ud6a8\uacfc \uae30\ubcf8 \uadf8\ub9bc<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ubb3c\uccb4 \ub610\ub294 \uad00\ucc30\uc790\uac00 \uc6c0\uc9c1\uc774\uba74\n      \uad00\ucc30\ub418\ub294 \ud30c\uc7a5\uacfc \uc8fc\ud30c\uc218\uac00 \ub2ec\ub77c\uc9c4\ub2e4.\n    <\/p>\n\n    <pre>\n      \uc774\ub3d9 \ubb3c\uccb4\n\n        \u25cf  \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u25ba v\n\n           )))  )))  )))  )))\n                   \ud30c\ub3d9\n\n                              \u25c4\u2500\u2500 \uad00\ucc30\uc790\n    <\/pre>\n\n    <div class=\"formula\">\n      \u03bb = c\/f\n    <\/div>\n\n    <p>\n      \uc5ec\uae30\uc11c\n    <\/p>\n\n    <div class=\"formula\">\n      c : \ud30c\ub3d9\uc758 \uc804\ud30c\uc18d\ub3c4\n    <\/div>\n\n    <div class=\"formula\">\n      f : \uc8fc\ud30c\uc218\n    <\/div>\n\n    <div class=\"formula\">\n      \u03bb : \ud30c\uc7a5\n    <\/div>\n\n    <div class=\"memory\">\n      <strong>\n        \uc0c1\ub300\uc6b4\ub3d9\uc5d0 \uc758\ud574 \ud30c\uc7a5\uc774 \ubcc0\ud558\uba74\n        \uad00\ucc30\ub418\ub294 \uc8fc\ud30c\uc218\ub3c4 \ubcc0\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>2. \ubb3c\uccb4\uac00 \uad00\ucc30\uc790 \ucabd\uc73c\ub85c \uc774\ub3d9<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ud544\uae30\uc5d0\uc11c\ub294 \ubb3c\uccb4\uac00 \uad00\ucc30\uc790 \ubc29\ud5a5\uc73c\ub85c \uc774\ub3d9\ud558\uba74\n      \ud30c\uc7a5\uc774 \uac10\uc18c\ud55c\ub2e4\uace0 \uc815\ub9ac\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      \u03bb&#8217; &lt; \u03bb\n    <\/div>\n\n    <p>\n      \ud30c\ub3d9\uc6d0\uc774 \uc18d\ub3c4 v\ub85c \uc774\ub3d9\ud558\uba74\n      \ud55c \uc8fc\uae30 \ub3d9\uc548 \uc774\ub3d9\ud55c \uac70\ub9ac\ub9cc\ud07c\n      \ud30c\uc7a5\uc774 \uac10\uc18c\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      \u03bb&#8217;\n      =\n      (c-v)\/f\n    <\/div>\n\n    <p>\n      \uc0c8\ub85c\uc6b4 \uc8fc\ud30c\uc218\ub294\n    <\/p>\n\n    <div class=\"formula\">\n      f&#8217;\n      =\n      c\/\u03bb&#8217;\n    <\/div>\n\n    <p>\n      \uc774\ubbc0\ub85c\n    <\/p>\n\n    <div class=\"formula\">\n      f&#8217;\n      =\n      c\/(c-v)\n      \u00b7\n      f\n    <\/div>\n\n    <div class=\"memory\">\n      <strong>\n        \ubb3c\uccb4\uac00 \uc811\uadfc\ud558\uba74\n        \u03bb\ub294 \uac10\uc18c\ud558\uace0 f\ub294 \uc99d\uac00\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>3. \ubb3c\uccb4\uac00 \uad00\ucc30\uc790\uc5d0\uc11c \uba40\uc5b4\uc9d0<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ubb3c\uccb4\uac00 \uad00\ucc30\uc790\ub85c\ubd80\ud130 \uba40\uc5b4\uc9c0\ub294 \uacbd\uc6b0\uc5d0\ub294\n      \ud30c\uc7a5\uc774 \uc99d\uac00\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      \u03bb&#8217; &gt; \u03bb\n    <\/div>\n\n    <p>\n      \ub530\ub77c\uc11c \ud544\uae30\uc5d0\uc11c\ub294\n    <\/p>\n\n    <div class=\"formula\">\n      f&#8217;\n      =\n      c\/(c+v)\n      \u00b7\n      f\n    <\/div>\n\n    <p>\n      \ub85c \uc815\ub9ac\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"memory\">\n      <strong>\n        \ubb3c\uccb4\uac00 \uba40\uc5b4\uc9c0\uba74\n        \u03bb\ub294 \uc99d\uac00\ud558\uace0 f\ub294 \uac10\uc18c\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>4. \uc8fc\ud30c\uc218 \ubcc0\ud654\ub7c9<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uc811\uadfc\ud558\ub294 \uacbd\uc6b0\n    <\/p>\n\n    <div class=\"formula\">\n      f&#8217;\n      =\n      1\/(1-v\/c)\n      \u00b7\n      f\n    <\/div>\n\n    <p>\n      \uc774\ubbc0\ub85c\n    <\/p>\n\n    <div class=\"formula\">\n      \u0394f\n      =\n      f&#8217; &#8211; f\n    <\/div>\n\n    <div class=\"formula\">\n      \u0394f\n      =\n      [\n      1\/(1-v\/c)\n      &#8211;\n      1\n      ]\n      f\n    <\/div>\n\n    <p>\n      v \u226a c\uc778 \uacbd\uc6b0\uc5d0\ub294\n    <\/p>\n\n    <div class=\"formula\">\n      \u0394f\n      \u2248\n      (v\/c)f\n    <\/div>\n\n    <p>\n      \uadf8\ub9ac\uace0\n    <\/p>\n\n    <div class=\"formula\">\n      c = f\u03bb\n    <\/div>\n\n    <p>\n      \uc774\ubbc0\ub85c\n    <\/p>\n\n    <div class=\"formula\">\n      \u0394f\n      \u2248\n      v\/\u03bb\n    <\/div>\n\n    <div class=\"memory\">\n      <strong>\n        \ud30c\uc7a5 \u03bb\ub97c \uc54c\uace0 \uc8fc\ud30c\uc218 \ubcc0\ud654\ub7c9 \u0394f\ub97c \uce21\uc815\ud558\uba74\n        \uc18d\ub3c4 v\ub97c \uacc4\uc0b0\ud560 \uc218 \uc788\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>5. \uc1a1\uc2e0\uae30\uc640 \uc218\uc2e0\uae30\uac00 \ud568\uaed8 \uc788\ub294 \uacbd\uc6b0<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uc774\ubbf8\uc9c0\uc5d0\uc11c\ub294 \uc1a1\uc2e0\uae30\uc640 \uc218\uc2e0\uae30\uac00 \uac19\uc740 \uc704\uce58\uc5d0 \uc788\uace0,\n      \uc6c0\uc9c1\uc774\ub294 \ubb3c\uccb4\uc5d0\uc11c \ubc18\uc0ac\ub41c \ud30c\ub97c \ub2e4\uc2dc \uc218\uc2e0\ud558\ub294 \uacbd\uc6b0\ub97c \ub2e4\ub8ec\ub2e4.\n    <\/p>\n\n    <pre>\n      \uc1a1\uc2e0\uae30 \/ \uc218\uc2e0\uae30\n          \u2502\n          \u2502  fs\n          \u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u25ba\n          \u2502                  [ \uc774\ub3d9 \ubb3c\uccb4 ]\n          \u2502                      \u2500\u2500\u2500\u25ba v\n          \u2502\n          \u25c4\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n               fr\n    <\/pre>\n\n    <p>\n      \uc1a1\uc2e0\ud30c\uac00 \uc6c0\uc9c1\uc774\ub294 \ubb3c\uccb4\uc5d0 \ub3c4\ub2ec\ud560 \ub54c\n      \ud55c \ubc88\uc758 Doppler Shift\uac00 \ubc1c\uc0dd\ud558\uace0,\n      \ubc18\uc0ac\ub418\uc5b4 \uc218\uc2e0\uae30\ub85c \ub3cc\uc544\uc62c \ub54c\n      \ub2e4\uc2dc \ud55c \ubc88 Doppler Shift\uac00 \ubc1c\uc0dd\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"memory\">\n      <strong>\n        \ubc18\uc0ac\ud615 Doppler \uce21\uc815\uc5d0\uc11c\ub294\n        \uc1a1\uc2e0 \u2192 \ubb3c\uccb4, \ubb3c\uccb4 \u2192 \uc218\uc2e0\uc758\n        \ub450 \ub2e8\uacc4\uc5d0\uc11c \uc8fc\ud30c\uc218 \ubcc0\ud654\uac00 \ubc1c\uc0dd\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>6. \ubc18\uc0ac\ud615 \ub3c4\ud50c\ub7ec \uc8fc\ud30c\uc218<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ud544\uae30\uc5d0\uc11c\ub294 \ubb3c\uccb4\uac00 \uc811\uadfc\ud558\ub294 \uacbd\uc6b0\n      \uccab \ubc88\uc9f8 \uc8fc\ud30c\uc218 \ubcc0\ud654\ub97c\n    <\/p>\n\n    <div class=\"formula\">\n      f<sub>1<\/sub>\n      =\n      (c+v)\/c\n      \u00b7\n      f<sub>s<\/sub>\n    <\/div>\n\n    <p>\n      \ub85c \ub098\ud0c0\ub0b8\ub2e4.\n    <\/p>\n\n    <p>\n      \ub2e4\uc2dc \ubc18\uc0ac\ub418\uc5b4 \uc218\uc2e0\uae30\ub85c \ub3cc\uc544\uc624\ub294 \uacbd\uc6b0\n      \uc218\uc2e0 \uc8fc\ud30c\uc218\ub294\n    <\/p>\n\n    <div class=\"formula\">\n      f<sub>r<\/sub>\n      =\n      c\/(c-v)\n      \u00b7\n      f<sub>1<\/sub>\n    <\/div>\n\n    <p>\n      \ub530\ub77c\uc11c\n    <\/p>\n\n    <div class=\"formula\">\n      f<sub>r<\/sub>\n      =\n      (c+v)\/(c-v)\n      \u00b7\n      f<sub>s<\/sub>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>7. \ubc18\uc0ac\ud615 Doppler Shift<\/h2>\n\n  <div class=\"card\">\n\n    <div class=\"formula\">\n      \u0394f\n      =\n      f<sub>r<\/sub>\n      &#8211;\n      f<sub>s<\/sub>\n    <\/div>\n\n    <p>\n      \uc55e\uc758 \uc2dd\uc744 \ub300\uc785\ud558\uba74\n    <\/p>\n\n    <div class=\"formula\">\n      \u0394f\n      =\n      [\n      (c+v)\/(c-v)\n      &#8211;\n      1\n      ]\n      f<sub>s<\/sub>\n    <\/div>\n\n    <div class=\"formula\">\n      \u0394f\n      =\n      2v\/(c-v)\n      \u00b7\n      f<sub>s<\/sub>\n    <\/div>\n\n    <p>\n      v \u226a c\uc778 \uacbd\uc6b0\uc5d0\ub294\n    <\/p>\n\n    <div class=\"formula\">\n      \u0394f\n      \u2248\n      2v\/c\n      \u00b7\n      f<sub>s<\/sub>\n    <\/div>\n\n    <p>\n      \uadf8\ub9ac\uace0\n    <\/p>\n\n    <div class=\"formula\">\n      c = f<sub>s<\/sub>\u03bb\n    <\/div>\n\n    <p>\n      \uc774\ubbc0\ub85c\n    <\/p>\n\n    <div class=\"formula\">\n      \u0394f\n      \u2248\n      2v\/\u03bb\n    <\/div>\n\n    <div class=\"memory\">\n      <strong>\n        \ubc18\uc0ac\ud615 Doppler \uce21\uc815\uc5d0\uc11c\ub294\n        \uc655\ubcf5 \uacbd\ub85c \ub54c\ubb38\uc5d0 \uc8fc\ud30c\uc218 \ubcc0\ud654\ub7c9\uc774 \uc57d 2\ubc30\uac00 \ub41c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>8. \uc785\uc0ac\uac01 \u03b8\ub97c \uace0\ub824\ud55c \uacbd\uc6b0<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uc2e4\uc81c \uce21\uc815\uc5d0\uc11c\ub294 \ubb3c\uccb4\uc758 \uc774\ub3d9\ubc29\ud5a5\uacfc\n      \uc1a1\uc218\uc2e0\ud30c\uc758 \ubc29\ud5a5\uc774 \uc77c\uce58\ud558\uc9c0 \uc54a\uc744 \uc218 \uc788\ub2e4.\n    <\/p>\n\n    <pre>\n                       [ \ubb3c\uccb4 ]\n                         \u2500\u2500\u2500\u2500\u2500\u25ba v\n\n                           \/\n                          \/  \u03b8\n                         \/\n      \uc1a1\uc218\uc2e0\uae30 \u25cf\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\/\n    <\/pre>\n\n    <p>\n      Doppler \ud6a8\uacfc\uc5d0 \uae30\uc5ec\ud558\ub294 \uc18d\ub3c4\ub294\n      \ud30c\ub3d9 \ubc29\ud5a5 \uc131\ubd84\uc774\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      v<sub>r<\/sub>\n      =\n      v cos\u03b8\n    <\/div>\n\n    <p>\n      \ub530\ub77c\uc11c\n    <\/p>\n\n    <div class=\"formula\">\n      \u0394f\n      \u2248\n      2v cos\u03b8 \/ \u03bb\n    <\/div>\n\n    <div class=\"memory\">\n      <strong>\n        \uc785\uc0ac\uac01\uc774 \uc874\uc7ac\ud558\uba74\n        \uc2e4\uc81c \uc18d\ub3c4\uc758 cos\u03b8 \uc131\ubd84\ub9cc Doppler Shift\uc5d0 \uae30\uc5ec\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>9. \ucd08\uc74c\ud30c \uc13c\uc11c\uc5d0 \uc758\ud55c \uc18d\ub3c4 \uce21\uc815<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uc774\ubbf8\uc9c0\uc5d0\uc11c\ub294 \ucd08\uc74c\ud30c \uc13c\uc11c\uc640 \uc6c0\uc9c1\uc774\ub294 \ubb3c\uccb4 \uc0ac\uc774\uc758\n      \uac70\ub9ac\ub97c \uc774\uc6a9\ud55c \uc18d\ub3c4 \uce21\uc815\ub3c4 \ud568\uaed8 \uc815\ub9ac\ud55c\ub2e4.\n    <\/p>\n\n    <pre>\n      Source \/ Receiver\n\n            \u25cf\n             \\ \u03b8\n              \\\n               \\\n                [ \ubb3c\uccb4 ]\n                   \u2500\u2500\u2500\u25ba v\n\n         <------ L ------>\n    <\/pre>\n\n    <p>\n      \uc655\ubcf5\uac70\ub9ac \uad00\uacc4\ub97c \uc774\uc6a9\ud558\uba74\n    <\/p>\n\n    <div class=\"formula\">\n      vt cos\u03b8 \/ 2\n      =\n      L\n    <\/div>\n\n    <p>\n      \u03b8 \u2248 0\uc778 \uacbd\uc6b0\n    <\/p>\n\n    <div class=\"formula\">\n      L\n      =\n      vt\/2\n    <\/div>\n\n    <div class=\"memory\">\n      <strong>\n        \ucd08\uc74c\ud30c Time-of-Flight \ubc29\uc2dd\uc740\n        \uc655\ubcf5\uc2dc\uac04\uacfc \uc74c\uc18d\uc73c\ub85c \uac70\ub9ac\ub97c \uad6c\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>10. \uc655\ubcf5\uc2dc\uac04\uacfc \uac70\ub9ac<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ud544\uae30\uc5d0\uc11c\ub294\n    <\/p>\n\n    <div class=\"formula\">\n      v : \uc74c\uc18d [m\/s]\n    <\/div>\n\n    <div class=\"formula\">\n      t : \uc655\ubcf5\uc2dc\uac04 [s]\n    <\/div>\n\n    <p>\n      \ub85c \ub450\uace0\n    <\/p>\n\n    <div class=\"formula\">\n      L\n      =\n      vt cos\u03b8 \/ 2\n    <\/div>\n\n    <p>\n      \ub85c \uc815\ub9ac\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"memory\">\n      <strong>\n        \uc655\ubcf5 \uacbd\ub85c\uc774\ubbc0\ub85c \uce21\uc815\uac70\ub9ac\uc5d0\ub294 1\/2\uc774 \ud3ec\ud568\ub41c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>11. \uc0c1\ub300\ub860\uc801 \uc2dc\uac04\uc9c0\uc5f0<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uc774\ubbf8\uc9c0\uc5d0\ub294 \uc0c1\ub300\ub860\uc801 Doppler Effect\ub3c4 \ud568\uaed8 \uc815\ub9ac\ub418\uc5b4 \uc788\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      \u0394t&#8217;\n      =\n      1\n      \/\n      \u221a{\n      1-(v\/c)\u00b2\n      }\n      \u00b7\n      \u0394t\n    <\/div>\n\n    <p>\n      \uc989 \uc6c0\uc9c1\uc774\ub294 \uad00\ucc30\uacc4\uc5d0\uc11c \uc2dc\uac04\uac04\uaca9\uc774 \ubcc0\ud654\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"memory\">\n      <strong>\n        v\uac00 c\uc5d0 \uac00\uae4c\uc6cc\uc9c8\uc218\ub85d\n        \uace0\uc804\uc801 Doppler \uc2dd\uc774 \uc544\ub2c8\ub77c\n        \uc0c1\ub300\ub860\uc801 \uc2dc\uac04\uc9c0\uc5f0\uc744 \ud568\uaed8 \uace0\ub824\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>12. \uc0c1\ub300\ub860\uc801 Doppler Frequency<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ud544\uae30\uc5d0\uc11c\ub294 \uc774\ub3d9\ud558\ub294 \ubb3c\uccb4\uc758 \uc8fc\ud30c\uc218\ub97c\n      \uc2dc\uac04\uc9c0\uc5f0\uacfc \ud568\uaed8 \uc815\ub9ac\ud558\uc5ec\n    <\/p>\n\n    <div class=\"formula\">\n      f&#8217;\n      =\n      \u221a{\n      (1-v\/c)\n      \/\n      (1+v\/c)\n      }\n      \u00b7\n      f\n    <\/div>\n\n    <p>\n      \ud615\ud0dc\ub85c \ub098\ud0c0\ub0b8\ub2e4.\n    <\/p>\n\n    <p>\n      \ubc18\ub300 \ubc29\ud5a5\uc5d0\uc11c\ub294\n      \ubd80\ud638\uac00 \ubc14\ub00c\ub294 \ud615\ud0dc\ub85c \uae30\ub85d\ub418\uc5b4 \uc788\ub2e4.\n    <\/p>\n\n    <div class=\"memory\">\n      <strong>\n        \uc0c1\ub300\ub860\uc801 Doppler Effect\uc5d0\uc11c\ub294\n        \uc2dc\uac04\uc9c0\uc5f0\uacfc \uc0c1\ub300\uc6b4\ub3d9 \ud6a8\uacfc\ub97c \ub3d9\uc2dc\uc5d0 \uace0\ub824\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>13. \uc800\uc18d \uadfc\uc0ac<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      v \u226a c\uc774\uba74\n    <\/p>\n\n    <div class=\"formula\">\n      (v\/c)\u00b2\n      \u2248\n      0\n    <\/div>\n\n    <p>\n      \ub85c \uadfc\uc0ac\ud560 \uc218 \uc788\uace0,\n      \uc0c1\ub300\ub860\uc801 \uc2dd\uc740 \uace0\uc804\uc801 Doppler \uad00\uacc4\uc5d0 \uac00\uae4c\uc6cc\uc9c4\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      f&#8217;\n      \u2248\n      1\/(1+v\/c)\n      \u00b7\n      f\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>14. \uc774\ubbf8\uc9c0 \ud575\uc2ec \uad00\uacc4<\/h2>\n\n  <div class=\"table-wrap\">\n\n    <table>\n\n      <thead>\n        <tr>\n          <th>\ud56d\ubaa9<\/th>\n          <th>\uc774\ubbf8\uc9c0 \ub0b4\uc6a9<\/th>\n        <\/tr>\n      <\/thead>\n\n      <tbody>\n\n        <tr>\n          <td><strong>\ud30c\uc7a5<\/strong><\/td>\n          <td>\n            \u03bb = c\/f\n          <\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\uc811\uadfc \uc2dc<\/strong><\/td>\n          <td>\n            f&#8217; = c\/(c-v) \u00b7 f\n          <\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\ud6c4\ud1f4 \uc2dc<\/strong><\/td>\n          <td>\n            f&#8217; = c\/(c+v) \u00b7 f\n          <\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\uc800\uc18d Doppler Shift<\/strong><\/td>\n          <td>\n            \u0394f \u2248 (v\/c)f = v\/\u03bb\n          <\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\ubc18\uc0ac\ud615 \uc218\uc2e0 \uc8fc\ud30c\uc218<\/strong><\/td>\n          <td>\n            f<sub>r<\/sub>\n            =\n            (c+v)\/(c-v)\n            \u00b7\n            f<sub>s<\/sub>\n          <\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\ubc18\uc0ac\ud615 Doppler Shift<\/strong><\/td>\n          <td>\n            \u0394f \u2248 2v\/\u03bb\n          <\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\uc785\uc0ac\uac01 \ud3ec\ud568<\/strong><\/td>\n          <td>\n            \u0394f \u2248 2v cos\u03b8 \/ \u03bb\n          <\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\uac70\ub9ac \uce21\uc815<\/strong><\/td>\n          <td>\n            L = vt cos\u03b8 \/ 2\n          <\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\uc0c1\ub300\ub860\uc801 \uc2dc\uac04\uc9c0\uc5f0<\/strong><\/td>\n          <td>\n            \u0394t&#8217;\n            =\n            \u0394t \/ \u221a(1-(v\/c)\u00b2)\n          <\/td>\n        <\/tr>\n\n      <\/tbody>\n\n    <\/table>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <div class=\"keywords\">\n    Doppler Effect, Doppler Shift,\n    Frequency Shift, Wavelength,\n    Ultrasonic Sensor, Velocity Measurement,\n    Moving Source, Moving Observer,\n    Reflection Doppler, Time of Flight,\n    Relativistic Doppler Effect\n  <\/div>\n\n<\/div>\n&#8220;`\n\n\n\n<style>\n.chapter19-wide {\n  width: 100%;\n  max-width: 1500px;\n  margin: 0 auto;\n  padding: 28px 36px;\n  box-sizing: border-box;\n  font-family: \"Noto Sans KR\", \"Malgun Gothic\", sans-serif;\n  font-size: 19px;\n  line-height: 1.85;\n  color: #222;\n  background: #fff;\n  overflow-wrap: break-word;\n}\n.chapter19-wide h1 {\n  font-size: 34px;\n  margin: 0 0 12px;\n  color: #17365d;\n}\n.chapter19-wide h2 {\n  font-size: 27px;\n  margin: 38px 0 14px;\n  padding-bottom: 8px;\n  border-bottom: 2px solid #28669b;\n  color: #17365d;\n}\n.chapter19-wide h3 {\n  font-size: 22px;\n  margin: 25px 0 10px;\n  color: #265783;\n}\n.chapter19-wide p {\n  margin: 12px 0;\n}\n.chapter19-wide .subtitle {\n  font-size: 19px;\n  color: #555;\n  margin-bottom: 30px;\n}\n.chapter19-wide .formula {\n  margin: 18px 0;\n  padding: 14px 12px;\n  background: #f1f6fb;\n  border-left: 4px solid #377ca9;\n  text-align: center;\n  font-size: 23px;\n  line-height: 1.9;\n  overflow-x: auto;\n}\n.chapter19-wide .formula strong {\n  color: #174d7c;\n}\n.chapter19-wide .note {\n  padding: 16px 20px;\n  margin: 20px 0;\n  border: 1px solid #c4d8e8;\n  background: #f7fafc;\n}\n.chapter19-wide .warning {\n  padding: 16px 20px;\n  margin: 20px 0;\n  border-left: 5px solid #b77727;\n  background: #fff9ef;\n}\n.chapter19-wide table {\n  width: 100%;\n  border-collapse: collapse;\n  margin: 20px 0;\n  font-size: 18px;\n}\n.chapter19-wide th,\n.chapter19-wide td {\n  border: 1px solid #c8d1db;\n  padding: 12px 14px;\n  text-align: left;\n  vertical-align: middle;\n}\n.chapter19-wide th {\n  background: #e9f1f8;\n  color: #183f66;\n}\n.chapter19-wide .diagram {\n  margin: 20px 0;\n  padding: 18px;\n  border: 1px solid #d2dce5;\n  background: #fcfdff;\n  text-align: center;\n}\n.chapter19-wide .diagram svg {\n  display: block;\n  width: 100%;\n  max-width: 850px;\n  height: auto;\n  margin: 0 auto;\n}\n.chapter19-wide .caption {\n  color: #626b73;\n  font-size: 16px;\n  margin-top: 8px;\n}\n.chapter19-wide .step {\n  margin: 18px 0;\n  padding: 16px 20px;\n  border-left: 4px solid #4d8dbd;\n  background: #fafcff;\n}\n.chapter19-wide .emphasis {\n  color: #174e80;\n  font-weight: 700;\n}\n.chapter19-wide .small {\n  font-size: 16px;\n  color: #666;\n}\n@media(max-width:700px) {\n  .chapter19-wide {\n    padding: 18px 14px;\n    font-size: 17px;\n  }\n  .chapter19-wide h1 { font-size: 27px; }\n  .chapter19-wide h2 { font-size: 23px; }\n  .chapter19-wide .formula { font-size: 19px; }\n  .chapter19-wide table { font-size: 15px; }\n  .chapter19-wide th,\n  .chapter19-wide td { padding: 8px; }\n}\n<\/style>\n\n<div class=\"chapter19-wide\">\n\n  <h1>\ub3c4\ud50c\ub7ec \ud6a8\uacfc\uc640 \ucd08\uc74c\ud30c \uc720\ub7c9\uacc4<\/h1>\n\n  <div class=\"subtitle\">\n    \uc6a9\uc5b4 \uc815\uc758 \u2192 \ud30c\uc7a5\uacfc \uc8fc\ud30c\uc218 \u2192 \uc74c\uc6d0\u00b7\uad00\ucc30\uc790\uc758 \uc774\ub3d9 \u2192\n    \ubc18\uc0ac\ud615 \ub3c4\ud50c\ub7ec \ud6a8\uacfc \u2192 \ucd08\uc74c\ud30c \uc720\ub7c9\uacc4 \uc801\uc6a9\n  <\/div>\n\n  <p>\n    \ub3c4\ud50c\ub7ec \ud6a8\uacfc(Doppler Effect)\ub294 \uc74c\uc6d0\uacfc \uad00\ucc30\uc790\uc758 \uc0c1\ub300\uc801\uc778\n    \uc6b4\ub3d9\uc5d0 \ub530\ub77c \uad00\ucc30\uc790\uac00 \uce21\uc815\ud558\ub294 \ud30c\ub3d9\uc758 \uc8fc\ud30c\uc218\uac00\n    \ub2ec\ub77c\uc9c0\ub294 \ud604\uc0c1\uc774\ub2e4.\n  <\/p>\n\n  <p>\n    \uc74c\ud30c\ub97c \ub9e4\uc9c8 \uae30\uc900\uc73c\ub85c \ud574\uc11d\ud558\uba74, \uc74c\uc6d0\uc774 \uc774\ub3d9\ud558\ub294 \uacbd\uc6b0\uc640\n    \uad00\ucc30\uc790\uac00 \uc774\ub3d9\ud558\ub294 \uacbd\uc6b0\uc5d0 \uc8fc\ud30c\uc218 \ubcc0\ud654\uac00 \ubc1c\uc0dd\ud558\ub294\n    \ubb3c\ub9ac\uc801 \uc6d0\uc778\uc774 \uc11c\ub85c \ub2e4\ub974\ub2e4.\n  <\/p>\n\n  <!-- ============================================= -->\n\n  <h2>1. \uae30\ubcf8 \uc6a9\uc5b4 \uc815\uc758<\/h2>\n\n  <table>\n    <thead>\n      <tr>\n        <th>\uc6a9\uc5b4<\/th>\n        <th>\uc815\uc758<\/th>\n        <th>\uae30\ud638<\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr>\n        <td>\uc74c\uc6d0(Source)<\/td>\n        <td>\ud30c\ub3d9\uc744 \ubc1c\uc0dd\uc2dc\ud0a4\ub294 \ub300\uc0c1<\/td>\n        <td>S<\/td>\n      <\/tr>\n      <tr>\n        <td>\uad00\ucc30\uc790(Observer)<\/td>\n        <td>\ud30c\ub3d9\uc744 \uc218\uc2e0\ud558\ub294 \ub300\uc0c1<\/td>\n        <td>O<\/td>\n      <\/tr>\n      <tr>\n        <td>\ubc18\uc0ac\uccb4(Reflector)<\/td>\n        <td>\uc785\uc0ac\ud30c\ub97c \ubc18\uc0ac\uc2dc\ud0a4\ub294 \ub300\uc0c1<\/td>\n        <td>R<\/td>\n      <\/tr>\n      <tr>\n        <td>\ud30c\ub3d9 \uc18d\ub3c4<\/td>\n        <td>\uc815\uc9c0\ud55c \ub9e4\uc9c8\uc5d0 \ub300\ud55c \ud30c\ub3d9\uc758 \uc804\ud30c\uc18d\ub3c4<\/td>\n        <td>c [m\/s]<\/td>\n      <\/tr>\n      <tr>\n        <td>\uc74c\uc6d0 \uc8fc\ud30c\uc218<\/td>\n        <td>\uc74c\uc6d0\uc5d0\uc11c \ubc1c\uc0dd\ud558\ub294 \ud30c\ub3d9\uc758 \uc8fc\ud30c\uc218<\/td>\n        <td>f<sub>s<\/sub> [Hz]<\/td>\n      <\/tr>\n      <tr>\n        <td>\uad00\uce21 \uc8fc\ud30c\uc218<\/td>\n        <td>\uad00\ucc30\uc790\uac00 \uc218\uc2e0\ud558\ub294 \ud30c\ub3d9\uc758 \uc8fc\ud30c\uc218<\/td>\n        <td>f\u2032 [Hz]<\/td>\n      <\/tr>\n      <tr>\n        <td>\ud30c\uc7a5<\/td>\n        <td>\uc5f0\uc18d\ub41c \ub450 \ud30c\uba74 \uc0ac\uc774\uc758 \uac70\ub9ac<\/td>\n        <td>\u03bb [m]<\/td>\n      <\/tr>\n      <tr>\n        <td>\uad00\ucc30\uc790 \uc18d\ub3c4<\/td>\n        <td>\ub9e4\uc9c8\uc5d0 \ub300\ud55c \uad00\ucc30\uc790\uc758 \uc774\ub3d9\uc18d\ub3c4<\/td>\n        <td>v<sub>o<\/sub> [m\/s]<\/td>\n      <\/tr>\n      <tr>\n        <td>\uc74c\uc6d0 \uc18d\ub3c4<\/td>\n        <td>\ub9e4\uc9c8\uc5d0 \ub300\ud55c \uc74c\uc6d0\uc758 \uc774\ub3d9\uc18d\ub3c4<\/td>\n        <td>v<sub>s<\/sub> [m\/s]<\/td>\n      <\/tr>\n    <\/tbody>\n  <\/table>\n\n  <div class=\"note\">\n    <strong>\uae30\ubcf8 \uac00\uc815<\/strong>\n    <p>\n      \uc544\ub798 \ub3c4\ud50c\ub7ec \uacf5\uc2dd\uc740 \uc74c\ud30c\uac00 \uc804\ud30c\ub418\ub294 \ub9e4\uc9c8\uc744\n      \uae30\uc900\uc73c\ub85c \ud55c\ub2e4. \ub9e4\uc9c8\uc740 \uc815\uc9c0\ud574 \uc788\uace0,\n      \uc74c\uc6d0\uacfc \uad00\ucc30\uc790\ub294 \ub3d9\uc77c\ud55c \uc9c1\uc120\uc0c1\uc5d0\uc11c \uc6b4\ub3d9\ud55c\ub2e4\uace0\n      \uac00\uc815\ud55c\ub2e4.\n    <\/p>\n    <p>\n      \uc774 \ub0b4\uc6a9\uc5d0\uc11c c\ub294 \uad11\uc18d\uc774 \uc544\ub2c8\ub77c\n      <strong>\ub9e4\uc9c8 \ub0b4\ubd80\uc758 \uc74c\uc18d<\/strong>\uc774\ub2e4.\n    <\/p>\n  <\/div>\n\n  <!-- ============================================= -->\n\n  <h2>2. \ud30c\uc7a5\uacfc \uc8fc\ud30c\uc218\uc758 \uad00\uacc4<\/h2>\n\n  <p>\n    \ud30c\uc7a5\uc740 \uc5f0\uc18d\ub41c \ub450 \ud30c\uba74 \uc0ac\uc774\uc758 \uacf5\uac04\uc801 \uac70\ub9ac\uc774\ub2e4.\n    \uc8fc\ud30c\uc218\ub294 \uad00\ucc30 \uc704\uce58\ub97c 1\ucd08 \ub3d9\uc548 \ud1b5\uacfc\ud558\ub294\n    \ud30c\uba74\uc758 \uac1c\uc218\uc774\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    <strong>c = f<sub>s<\/sub> \u00d7 \u03bb<\/strong>\n  <\/div>\n\n  <div class=\"formula\">\n    <strong>\u03bb = c \/ f<sub>s<\/sub><\/strong>\n  <\/div>\n\n  <div class=\"diagram\">\n    <svg viewBox=\"0 0 760 170\"\n         xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n         role=\"img\"\n         aria-label=\"\uc77c\uc815\ud55c \uac04\uaca9\uc73c\ub85c \uc804\ud30c\ub418\ub294 \ud30c\uba74\uacfc \ud30c\uc7a5\">\n      <line x1=\"40\" y1=\"95\" x2=\"720\" y2=\"95\"\n            stroke=\"#a6b5c2\" stroke-width=\"2\"\/>\n      <g stroke=\"#3183b9\" stroke-width=\"3\">\n        <line x1=\"100\" y1=\"65\" x2=\"100\" y2=\"125\"\/>\n        <line x1=\"220\" y1=\"65\" x2=\"220\" y2=\"125\"\/>\n        <line x1=\"340\" y1=\"65\" x2=\"340\" y2=\"125\"\/>\n        <line x1=\"460\" y1=\"65\" x2=\"460\" y2=\"125\"\/>\n        <line x1=\"580\" y1=\"65\" x2=\"580\" y2=\"125\"\/>\n      <\/g>\n      <path d=\"M100 48 V35 H220 V48\"\n            fill=\"none\" stroke=\"#333\" stroke-width=\"2\"\/>\n      <text x=\"160\" y=\"27\" text-anchor=\"middle\"\n            font-size=\"20\">\ud30c\uc7a5 \u03bb<\/text>\n      <path d=\"M390 145 H530 L514 136 M530 145 L514 154\"\n            fill=\"none\" stroke=\"#ba7f42\" stroke-width=\"3\"\/>\n      <text x=\"540\" y=\"151\" font-size=\"18\">\ud30c\ub3d9 \uc9c4\ud589<\/text>\n    <\/svg>\n    <div class=\"caption\">\n      \ud30c\uc7a5\uc740 \ud30c\uba74 \uc0ac\uc774\uc758 \uac70\ub9ac\uc774\uba70, \ud30c\ub3d9\uc740\n      \ub9e4\uc9c8\uc5d0 \ub300\ud574 \uc18d\ub3c4 c\ub85c \uc774\ub3d9\ud55c\ub2e4.\n    <\/div>\n  <\/div>\n\n  <h3>2.1 \uad00\ucc30\uc790\uac00 \uc815\uc9c0\ud55c \uacbd\uc6b0<\/h3>\n\n  <p>\n    \uc74c\uc6d0\uacfc \uad00\ucc30\uc790\uac00 \ubaa8\ub450 \uc815\uc9c0\ud574 \uc788\ub2e4\uba74\n    \uad00\ucc30\uc790\uac00 \ub9cc\ub098\ub294 \ud30c\uba74\uc758 \uc0c1\ub300\uc18d\ub3c4\ub294 c\uc774\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    f\u2032 = c \/ \u03bb = f<sub>s<\/sub>\n  <\/div>\n\n  <p>\n    \uc989, \uc1a1\uc2e0 \uc8fc\ud30c\uc218\uc640 \uad00\uce21 \uc8fc\ud30c\uc218\uac00 \uac19\ub2e4.\n  <\/p>\n\n  <h3>2.2 \uad00\ucc30\uc790\ub9cc \uc6c0\uc9c1\uc774\ub294 \uacbd\uc6b0<\/h3>\n\n  <p>\n    \uc74c\uc6d0\uc740 \uc815\uc9c0\ud574 \uc788\uc73c\ubbc0\ub85c \ub9e4\uc9c8 \uc18d \ud30c\uc7a5\uc740\n    \ubcc0\ud558\uc9c0 \uc54a\ub294\ub2e4.\n  <\/p>\n\n  <p>\n    \uadf8\ub7ec\ub098 \uad00\ucc30\uc790\uac00 \ud30c\ub3d9\uc744 \ud5a5\ud574 \uc6c0\uc9c1\uc774\uba74\n    \ud30c\uba74\uacfc \uad00\ucc30\uc790\uc758 \uc0c1\ub300\uc18d\ub3c4\uac00 \uc99d\uac00\ud55c\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    \uc0c1\ub300\uc18d\ub3c4 = c + v<sub>o<\/sub>\n  <\/div>\n\n  <p>\n    \uc8fc\ud30c\uc218\ub294 \ud30c\uba74\uacfc \uad00\ucc30\uc790\uc758 \uc0c1\ub300\uc18d\ub3c4\ub97c\n    \ud30c\uc7a5\uc73c\ub85c \ub098\ub208 \uac12\uc774\ubbc0\ub85c,\n  <\/p>\n\n  <div class=\"formula\">\n    f\u2032 = (c + v<sub>o<\/sub>) \/ \u03bb\n  <\/div>\n\n  <p>\n    \u03bb = c \/ f<sub>s<\/sub>\ub97c \ub300\uc785\ud558\uba74,\n  <\/p>\n\n  <div class=\"formula\">\n    <strong>\n      f\u2032 = f<sub>s<\/sub>\n      \u00d7 (c + v<sub>o<\/sub>) \/ c\n    <\/strong>\n  <\/div>\n\n  <div class=\"note\">\n    <strong>\ud575\uc2ec<\/strong>\n    <p>\n      \uad00\ucc30\uc790\uac00 \uc774\ub3d9\ud574\ub3c4 \ub9e4\uc9c8 \uc18d \ud30c\uc7a5\uc740\n      \ubcc0\ud558\uc9c0 \uc54a\ub294\ub2e4.\n      \uad00\ucc30\uc790\uac00 \ud30c\uba74\uc744 \ub9cc\ub098\ub294 \uc18d\ub3c4\uac00\n      \ub2ec\ub77c\uc9c0\uae30 \ub54c\ubb38\uc5d0 \uad00\uce21 \uc8fc\ud30c\uc218\uac00 \ubcc0\ud55c\ub2e4.\n    <\/p>\n  <\/div>\n\n  <!-- ============================================= -->\n\n  <h2>3. \uc74c\uc6d0\uacfc \uad00\ucc30\uc790\uc758 \ub124 \uac00\uc9c0 \uc774\ub3d9 \uc0c1\ud669<\/h2>\n\n  <h3>3.1 \uad00\ucc30\uc790\uac00 \uc74c\uc6d0\uc5d0 \uc811\uadfc<\/h3>\n\n  <p>\n    \uc74c\uc6d0\uc740 \uc815\uc9c0\ud558\uace0 \uad00\ucc30\uc790\uac00 \uc74c\uc6d0 \ubc29\ud5a5\uc73c\ub85c \uc774\ub3d9\ud55c\ub2e4.\n    \uad00\ucc30\uc790\uac00 \ud30c\uba74\uc744 \ub9cc\ub098\ub294 \uc0c1\ub300\uc18d\ub3c4\ub294 c + v<sub>o<\/sub>\uc774\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    <strong>\n      f\u2032 = f<sub>s<\/sub>\n      \u00d7 (c + v<sub>o<\/sub>) \/ c\n    <\/strong>\n  <\/div>\n\n  <p>\n    \uc0c1\ub300\uc18d\ub3c4\uac00 \uc99d\uac00\ud558\ubbc0\ub85c \uad00\uce21 \uc8fc\ud30c\uc218\uac00 \uc99d\uac00\ud55c\ub2e4.\n    \ub9e4\uc9c8 \uc18d \ud30c\uc7a5\uc740 \ubcc0\ud558\uc9c0 \uc54a\ub294\ub2e4.\n  <\/p>\n\n  <h3>3.2 \uad00\ucc30\uc790\uac00 \uc74c\uc6d0\uc5d0\uc11c \uba40\uc5b4\uc9d0<\/h3>\n\n  <p>\n    \uc74c\uc6d0\uc740 \uc815\uc9c0\ud558\uace0 \uad00\ucc30\uc790\uac00 \ud30c\ub3d9\uc758 \uc9c4\ud589 \ubc29\ud5a5\uc73c\ub85c\n    \uc774\ub3d9\ud55c\ub2e4.\n  <\/p>\n\n  <p>\n    \ud30c\uba74\uacfc \uad00\ucc30\uc790\uc758 \uc0c1\ub300\uc18d\ub3c4\ub294\n    c \u2212 v<sub>o<\/sub>\uc774\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    <strong>\n      f\u2032 = f<sub>s<\/sub>\n      \u00d7 (c \u2212 v<sub>o<\/sub>) \/ c\n    <\/strong>\n  <\/div>\n\n  <p>\n    \uc0c1\ub300\uc18d\ub3c4\uac00 \uac10\uc18c\ud558\ubbc0\ub85c \uad00\uce21 \uc8fc\ud30c\uc218\uac00 \uac10\uc18c\ud55c\ub2e4.\n    \uc774 \uacbd\uc6b0\uc5d0\ub3c4 \ub9e4\uc9c8 \uc18d \ud30c\uc7a5\uc740 \ubcc0\ud558\uc9c0 \uc54a\ub294\ub2e4.\n  <\/p>\n\n  <h3>3.3 \uc74c\uc6d0\uc774 \uad00\ucc30\uc790\uc5d0 \uc811\uadfc<\/h3>\n\n  <p>\n    \uc774\ubc88\uc5d0\ub294 \uad00\ucc30\uc790\uac00 \uc815\uc9c0\ud558\uace0 \uc74c\uc6d0\uc774 \uc774\ub3d9\ud55c\ub2e4.\n  <\/p>\n\n  <p>\n    \uc74c\uc6d0\uc774 \ud30c\uba74 \ud558\ub098\ub97c \ubc29\ucd9c\ud558\uace0 \ub2e4\uc74c \ud30c\uba74\uc744\n    \ubc29\ucd9c\ud558\uae30\uae4c\uc9c0 \uac78\ub9ac\ub294 \uc2dc\uac04\uc740\n    T = 1 \/ f<sub>s<\/sub>\uc774\ub2e4.\n  <\/p>\n\n  <p>\n    \uadf8\ub3d9\uc548 \uc74c\ud30c\ub294 cT\ub9cc\ud07c \uc774\ub3d9\ud558\uc9c0\ub9cc,\n    \uc74c\uc6d0\ub3c4 \uad00\ucc30\uc790 \ucabd\uc73c\ub85c v<sub>s<\/sub>T\ub9cc\ud07c\n    \uc774\ub3d9\ud55c\ub2e4.\n  <\/p>\n\n  <p>\n    \ub530\ub77c\uc11c \uc0c8\ub85c \ub9cc\ub4e4\uc5b4\uc9c0\ub294 \ud30c\uba74\uc758 \uac04\uaca9\uc740\n    \ub2e4\uc74c\uacfc \uac19\uc774 \uac10\uc18c\ud55c\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    \u03bb\u2032 = (c \u2212 v<sub>s<\/sub>)T\n  <\/div>\n\n  <div class=\"formula\">\n    \u03bb\u2032 = (c \u2212 v<sub>s<\/sub>) \/ f<sub>s<\/sub>\n  <\/div>\n\n  <p>\n    \uad00\ucc30\uc790\ub294 \uc815\uc9c0\ud574 \uc788\uc73c\ubbc0\ub85c \ud30c\uba74\uc774 \uad00\ucc30\uc790\ub97c\n    \ud1b5\uacfc\ud558\ub294 \uc18d\ub3c4\ub294 c\uc774\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    f\u2032 = c \/ \u03bb\u2032\n  <\/div>\n\n  <div class=\"formula\">\n    <strong>\n      f\u2032 = f<sub>s<\/sub>\n      \u00d7 c \/ (c \u2212 v<sub>s<\/sub>)\n    <\/strong>\n  <\/div>\n\n  <p>\n    \ud30c\uc7a5\uc774 \uc9e7\uc544\uc9c0\ubbc0\ub85c \uad00\uce21 \uc8fc\ud30c\uc218\uac00 \uc99d\uac00\ud55c\ub2e4.\n  <\/p>\n\n  <h3>3.4 \uc74c\uc6d0\uc774 \uad00\ucc30\uc790\uc5d0\uc11c \uba40\uc5b4\uc9d0<\/h3>\n\n  <p>\n    \uc74c\uc6d0\uc774 \uad00\ucc30\uc790\uc5d0\uc11c \uba40\uc5b4\uc9c0\uba74 \uc5f0\uc18d\ub41c \ud30c\uba74 \uc0ac\uc774\uc758\n    \uac04\uaca9\uc774 \uae38\uc5b4\uc9c4\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    \u03bb\u2032 = (c + v<sub>s<\/sub>) \/ f<sub>s<\/sub>\n  <\/div>\n\n  <div class=\"formula\">\n    <strong>\n      f\u2032 = f<sub>s<\/sub>\n      \u00d7 c \/ (c + v<sub>s<\/sub>)\n    <\/strong>\n  <\/div>\n\n  <p>\n    \ud30c\uc7a5\uc774 \uae38\uc5b4\uc9c0\ubbc0\ub85c \uad00\uce21 \uc8fc\ud30c\uc218\ub294 \uac10\uc18c\ud55c\ub2e4.\n  <\/p>\n\n  <!-- ============================================= -->\n\n  <h2>4. \ub124 \uac00\uc9c0 \uacbd\uc6b0 \ube44\uad50<\/h2>\n\n  <table>\n    <thead>\n      <tr>\n        <th>\uc774\ub3d9 \ub300\uc0c1<\/th>\n        <th>\uc774\ub3d9 \ubc29\ud5a5<\/th>\n        <th>\uad00\uce21 \uc8fc\ud30c\uc218<\/th>\n        <th>\ubb3c\ub9ac\uc801 \uc6d0\uc778<\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr>\n        <td>\uad00\ucc30\uc790<\/td>\n        <td>\uc74c\uc6d0\uc5d0 \uc811\uadfc<\/td>\n        <td>f<sub>s<\/sub>(c + v<sub>o<\/sub>)\/c<\/td>\n        <td>\ud30c\uba74\uc744 \ub354 \uc790\uc8fc \ub9cc\ub0a8<\/td>\n      <\/tr>\n      <tr>\n        <td>\uad00\ucc30\uc790<\/td>\n        <td>\uc74c\uc6d0\uc5d0\uc11c \uba40\uc5b4\uc9d0<\/td>\n        <td>f<sub>s<\/sub>(c \u2212 v<sub>o<\/sub>)\/c<\/td>\n        <td>\ud30c\uba74\uc744 \ub35c \uc790\uc8fc \ub9cc\ub0a8<\/td>\n      <\/tr>\n      <tr>\n        <td>\uc74c\uc6d0<\/td>\n        <td>\uad00\ucc30\uc790\uc5d0 \uc811\uadfc<\/td>\n        <td>f<sub>s<\/sub>c\/(c \u2212 v<sub>s<\/sub>)<\/td>\n        <td>\ud30c\uc7a5\uc774 \uc9e7\uc544\uc9d0<\/td>\n      <\/tr>\n      <tr>\n        <td>\uc74c\uc6d0<\/td>\n        <td>\uad00\ucc30\uc790\uc5d0\uc11c \uba40\uc5b4\uc9d0<\/td>\n        <td>f<sub>s<\/sub>c\/(c + v<sub>s<\/sub>)<\/td>\n        <td>\ud30c\uc7a5\uc774 \uae38\uc5b4\uc9d0<\/td>\n      <\/tr>\n    <\/tbody>\n  <\/table>\n\n  <div class=\"note\">\n    <strong>\ubd80\ud638\uc640 \ubd84\uc790\u00b7\ubd84\ubaa8\uc758 \uaddc\uce59<\/strong>\n\n    <p>\n      <span class=\"emphasis\">\uad00\ucc30\uc790\uac00 \uc6c0\uc9c1\uc774\uba74 \ubd84\uc790<\/span>\uc5d0\n      c \u00b1 v<sub>o<\/sub>\uac00 \ub098\ud0c0\ub09c\ub2e4.\n    <\/p>\n\n    <p>\n      <span class=\"emphasis\">\uc74c\uc6d0\uc774 \uc6c0\uc9c1\uc774\uba74 \ubd84\ubaa8<\/span>\uc5d0\n      c \u2213 v<sub>s<\/sub>\uac00 \ub098\ud0c0\ub09c\ub2e4.\n    <\/p>\n\n    <p>\n      \uad00\ucc30\uc790\uac00 \uc811\uadfc\ud558\uba74 \ubd84\uc790\ub294 +,\n      \uba40\uc5b4\uc9c0\uba74 \u2212\uc774\ub2e4.\n    <\/p>\n\n    <p>\n      \uc74c\uc6d0\uc774 \uc811\uadfc\ud558\uba74 \ubd84\ubaa8\ub294 \u2212,\n      \uba40\uc5b4\uc9c0\uba74 +\uc774\ub2e4.\n    <\/p>\n  <\/div>\n\n  <!-- ============================================= -->\n\n  <h2>5. \uc74c\uc6d0\uacfc \uad00\ucc30\uc790\uac00 \ub3d9\uc2dc\uc5d0 \uc6c0\uc9c1\uc774\ub294 \uacbd\uc6b0<\/h2>\n\n  <p>\n    \uc74c\uc6d0\uacfc \uad00\ucc30\uc790\uac00 \ub3d9\uc2dc\uc5d0 \uc6c0\uc9c1\uc774\uba74\n    \ub450 \uac00\uc9c0 \ud6a8\uacfc\ub97c \ud568\uaed8 \uc801\uc6a9\ud55c\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    <strong>\n      f\u2032 = f<sub>s<\/sub>\n      \u00d7 (c \u00b1 v<sub>o<\/sub>) \/ (c \u2213 v<sub>s<\/sub>)\n    <\/strong>\n  <\/div>\n\n  <p>\n    \uc74c\uc6d0\uacfc \uad00\ucc30\uc790\uac00 \uc11c\ub85c \uc811\uadfc\ud558\uba74,\n  <\/p>\n\n  <div class=\"formula\">\n    f\u2032 = f<sub>s<\/sub>\n    \u00d7 (c + v<sub>o<\/sub>) \/ (c \u2212 v<sub>s<\/sub>)\n  <\/div>\n\n  <p>\n    \uc11c\ub85c \uba40\uc5b4\uc9c0\uba74,\n  <\/p>\n\n  <div class=\"formula\">\n    f\u2032 = f<sub>s<\/sub>\n    \u00d7 (c \u2212 v<sub>o<\/sub>) \/ (c + v<sub>s<\/sub>)\n  <\/div>\n\n  <p class=\"small\">\n    \uc8fc\uc758: \ubd80\ud638\ub294 \uac01 \ub300\uc0c1\uc774 \uc74c\ud30c\uc758 \uc9c4\ud589 \ubc29\ud5a5\uc5d0 \ub300\ud574\n    \uc2e4\uc81c\ub85c \uc5b4\ub290 \ucabd\uc73c\ub85c \uc6c0\uc9c1\uc774\ub294\uc9c0\uc5d0 \ub530\ub77c \uacb0\uc815\ud574\uc57c \ud55c\ub2e4.\n    \uc74c\uc6d0\uacfc \uad00\ucc30\uc790\uac00 \uac19\uc740 \ubc29\ud5a5\uc73c\ub85c \uc6c0\uc9c1\uc774\ub294 \uacbd\uc6b0\uc5d0\ub294\n    \uac01\uc790\uc758 \uc774\ub3d9 \ubc29\ud5a5\uc744 \ub530\ub85c \ud655\uc778\ud55c\ub2e4.\n  <\/p>\n\n  <!-- ============================================= -->\n\n  <h2>6. \ubc18\uc0ac\ud615 \ub3c4\ud50c\ub7ec \ud6a8\uacfc<\/h2>\n\n  <p>\n    \ucd08\uc74c\ud30c \ub3c4\ud50c\ub7ec \uc720\ub7c9\uacc4\uc5d0\uc11c\ub294 \ucd08\uc74c\ud30c \uc13c\uc11c\uac00\n    \uc1a1\uc2e0\ud30c\ub97c \ubc1c\uc0dd\uc2dc\ud0a4\uace0, \uc720\uccb4\uc640 \ud568\uaed8 \uc6c0\uc9c1\uc774\ub294\n    \uc785\uc790 \ub610\ub294 \uae30\ud3ec\uac00 \uadf8 \ud30c\ub3d9\uc744 \ubc18\uc0ac\ud55c\ub2e4.\n  <\/p>\n\n  <p>\n    \uc13c\uc11c\ub294 \uc815\uc9c0\ud574 \uc788\uace0 \uc785\uc790\uac00 \uc13c\uc11c\ub97c \ud5a5\ud574\n    \uc18d\ub3c4 u\ub85c \uc774\ub3d9\ud55c\ub2e4\uace0 \uac00\uc815\ud55c\ub2e4.\n  <\/p>\n\n  <div class=\"diagram\">\n    <svg viewBox=\"0 0 760 215\"\n         xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n         role=\"img\"\n         aria-label=\"\ub3c4\ud50c\ub7ec \ucd08\uc74c\ud30c \uc720\ub7c9\uacc4\uc758 \uc1a1\uc2e0\ud30c\uc640 \ubc18\uc0ac\ud30c\">\n      <rect x=\"20\" y=\"35\" width=\"720\" height=\"145\"\n            rx=\"8\" fill=\"#eaf5fb\" stroke=\"#9ab4c4\"\/>\n      <rect x=\"42\" y=\"80\" width=\"120\" height=\"58\"\n            rx=\"8\" fill=\"#9fb5c5\" stroke=\"#607f95\"\/>\n      <text x=\"102\" y=\"114\" text-anchor=\"middle\"\n            font-size=\"21\">\uc13c\uc11c<\/text>\n\n      <circle cx=\"620\" cy=\"108\" r=\"24\"\n              fill=\"#8fc1db\" stroke=\"#397eaa\"\n              stroke-width=\"3\"\/>\n      <text x=\"620\" y=\"160\" text-anchor=\"middle\"\n            font-size=\"19\">\uc774\ub3d9 \uc785\uc790<\/text>\n\n      <path d=\"M178 90 H585 L570 79 M585 90 L570 101\"\n            fill=\"none\" stroke=\"#bb7b39\" stroke-width=\"4\"\/>\n      <text x=\"360\" y=\"74\" text-anchor=\"middle\"\n            font-size=\"19\">\u2460 \uc1a1\uc2e0\ud30c: \uc13c\uc11c \u2192 \uc785\uc790<\/text>\n\n      <path d=\"M585 130 H178 L193 119 M178 130 L193 141\"\n            fill=\"none\" stroke=\"#317fbc\" stroke-width=\"4\"\/>\n      <text x=\"360\" y=\"160\" text-anchor=\"middle\"\n            font-size=\"19\">\u2461 \ubc18\uc0ac\ud30c: \uc785\uc790 \u2192 \uc13c\uc11c<\/text>\n\n      <path d=\"M605 48 H543 L558 37 M543 48 L558 59\"\n            fill=\"none\" stroke=\"#4d966b\" stroke-width=\"3\"\/>\n      <text x=\"620\" y=\"29\" text-anchor=\"middle\"\n            font-size=\"18\">\uc785\uc790 \uc18d\ub3c4 u \u2190<\/text>\n    <\/svg>\n    <div class=\"caption\">\n      \uc13c\uc11c\ub294 \uc815\uc9c0\ud558\uace0 \uc785\uc790\uac00 \uc13c\uc11c \ubc29\ud5a5\uc73c\ub85c \uc774\ub3d9\ud558\ub294 \uacbd\uc6b0\n    <\/div>\n  <\/div>\n\n  <h3>6.1 \uccab \ubc88\uc9f8 \ub2e8\uacc4: \uc785\uc790\uac00 \uad00\ucc30\uc790<\/h3>\n\n  <div class=\"step\">\n    <strong>\ub300\uc0c1\uacfc \uc5ed\ud560<\/strong>\n    <p>\uc74c\uc6d0: \ucd08\uc74c\ud30c \uc13c\uc11c \u2014 \uc815\uc9c0<\/p>\n    <p>\uad00\ucc30\uc790: \uc720\uccb4 \uc18d \uc785\uc790 \u2014 \uc13c\uc11c \ubc29\ud5a5\uc73c\ub85c \uc774\ub3d9<\/p>\n    <p>\ud30c\ub3d9 \ubc29\ud5a5: \uc13c\uc11c \u2192 \uc785\uc790<\/p>\n    <p>\uc785\uc790 \uc774\ub3d9 \ubc29\ud5a5: \uc785\uc790 \u2192 \uc13c\uc11c<\/p>\n  <\/div>\n\n  <p>\n    \uc74c\ud30c\uc640 \uc785\uc790\uac00 \uc11c\ub85c \ub9c8\uc8fc \ubcf4\uba70 \uc811\uadfc\ud558\ubbc0\ub85c\n    \ud30c\uba74\uacfc \uc785\uc790\uc758 \uc0c1\ub300\uc18d\ub3c4\ub294 c + u\uc774\ub2e4.\n  <\/p>\n\n  <p>\n    \uc74c\uc6d0\uc778 \uc13c\uc11c\ub294 \uc815\uc9c0\ud574 \uc788\uc73c\ubbc0\ub85c\n    \ub9e4\uc9c8 \uc18d \ud30c\uc7a5\uc740 \ubcc0\ud558\uc9c0 \uc54a\ub294\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    \u03bb = c \/ f<sub>s<\/sub>\n  <\/div>\n\n  <div class=\"formula\">\n    f<sub>1<\/sub> = (c + u) \/ \u03bb\n  <\/div>\n\n  <div class=\"formula\">\n    <strong>\n      f<sub>1<\/sub> =\n      f<sub>s<\/sub>(c + u)\/c\n    <\/strong>\n  <\/div>\n\n  <p>\n    \uccab \ubc88\uc9f8 \ub2e8\uacc4\uc5d0\uc11c\ub294 \uc785\uc790\uac00 \uc6c0\uc9c1\uc774\ub294 \uad00\ucc30\uc790\uc774\ubbc0\ub85c\n    <strong>\ubd84\uc790\uc5d0 c + u<\/strong>\uac00 \ub098\ud0c0\ub09c\ub2e4.\n  <\/p>\n\n  <h3>6.2 \ub450 \ubc88\uc9f8 \ub2e8\uacc4: \uc785\uc790\uac00 \ub4f1\uac00 \uc74c\uc6d0<\/h3>\n\n  <div class=\"step\">\n    <strong>\ub300\uc0c1\uacfc \uc5ed\ud560<\/strong>\n    <p>\uc74c\uc6d0: \uc720\uccb4 \uc18d \uc785\uc790 \u2014 \ubc18\uc0ac\ud30c\uc758 \ub4f1\uac00 \uc74c\uc6d0<\/p>\n    <p>\uad00\ucc30\uc790: \ucd08\uc74c\ud30c \uc13c\uc11c \u2014 \uc815\uc9c0<\/p>\n    <p>\ud30c\ub3d9 \ubc29\ud5a5: \uc785\uc790 \u2192 \uc13c\uc11c<\/p>\n    <p>\uc785\uc790 \uc774\ub3d9 \ubc29\ud5a5: \uc785\uc790 \u2192 \uc13c\uc11c<\/p>\n  <\/div>\n\n  <p>\n    \uc785\uc790\ub294 \uc55e\uc11c \ubc1b\uc740 \uc8fc\ud30c\uc218 f<sub>1<\/sub>\ub85c\n    \ubc18\uc0ac\ud30c\ub97c \ub2e4\uc2dc \ubcf4\ub0b4\ub294 \uc6c0\uc9c1\uc774\ub294 \uc74c\uc6d0\ucc98\ub7fc \uc791\uc6a9\ud55c\ub2e4.\n  <\/p>\n\n  <p>\n    \uc785\uc790\uac00 \uc13c\uc11c\uc5d0 \uc811\uadfc\ud558\ubbc0\ub85c \ubc18\uc0ac\ud30c\uc758 \ud30c\uba74 \uac04\uaca9\uc740\n    \uc9e7\uc544\uc9c4\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    T<sub>1<\/sub> = 1 \/ f<sub>1<\/sub>\n  <\/div>\n\n  <div class=\"formula\">\n    \u03bb<sub>r<\/sub> = (c \u2212 u)T<sub>1<\/sub>\n  <\/div>\n\n  <div class=\"formula\">\n    \u03bb<sub>r<\/sub> = (c \u2212 u) \/ f<sub>1<\/sub>\n  <\/div>\n\n  <p>\n    \uc13c\uc11c\ub294 \uc815\uc9c0\ud574 \uc788\uc73c\ubbc0\ub85c \ubc18\uc0ac\ud30c\uc758 \uad00\uce21 \uc8fc\ud30c\uc218\ub294\n    \ub2e4\uc74c\uacfc \uac19\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    f<sub>r<\/sub> = c \/ \u03bb<sub>r<\/sub>\n  <\/div>\n\n  <div class=\"formula\">\n    <strong>\n      f<sub>r<\/sub> =\n      f<sub>1<\/sub>c\/(c \u2212 u)\n    <\/strong>\n  <\/div>\n\n  <p>\n    \ub450 \ubc88\uc9f8 \ub2e8\uacc4\uc5d0\uc11c\ub294 \uc785\uc790\uac00 \uc6c0\uc9c1\uc774\ub294 \uc74c\uc6d0\uc774\ubbc0\ub85c\n    <strong>\ubd84\ubaa8\uc5d0 c \u2212 u<\/strong>\uac00 \ub098\ud0c0\ub09c\ub2e4.\n  <\/p>\n\n  <!-- ============================================= -->\n\n  <h2>7. \ubc18\uc0ac\ud615 \ub3c4\ud50c\ub7ec \ucd5c\uc885\uc2dd \uc720\ub3c4<\/h2>\n\n  <p>\uccab \ubc88\uc9f8 \ub2e8\uacc4:<\/p>\n\n  <div class=\"formula\">\n    f<sub>1<\/sub> = f<sub>s<\/sub>(c + u)\/c\n  <\/div>\n\n  <p>\ub450 \ubc88\uc9f8 \ub2e8\uacc4:<\/p>\n\n  <div class=\"formula\">\n    f<sub>r<\/sub> = f<sub>1<\/sub>c\/(c \u2212 u)\n  <\/div>\n\n  <p>\ub450 \uc2dd\uc744 \uacb0\ud569\ud558\uba74,<\/p>\n\n  <div class=\"formula\">\n    f<sub>r<\/sub> =\n    f<sub>s<\/sub>\n    \u00d7 (c + u)\/c\n    \u00d7 c\/(c \u2212 u)\n  <\/div>\n\n  <div class=\"formula\">\n    <strong>\n      f<sub>r<\/sub> =\n      f<sub>s<\/sub>(c + u)\/(c \u2212 u)\n    <\/strong>\n  <\/div>\n\n  <p>\n    \ubc18\uc0ac\ud30c\uc758 \uc8fc\ud30c\uc218 \ubcc0\ud654\ub7c9\uc740\n    \u0394f = f<sub>r<\/sub> \u2212 f<sub>s<\/sub>\uc774\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    \u0394f = f<sub>s<\/sub>\n    [ (c + u)\/(c \u2212 u) \u2212 1 ]\n  <\/div>\n\n  <p>\ud1b5\ubd84\ud558\uba74,<\/p>\n\n  <div class=\"formula\">\n    \u0394f = f<sub>s<\/sub>\n    [ (c + u \u2212 c + u)\/(c \u2212 u) ]\n  <\/div>\n\n  <div class=\"formula\">\n    <strong>\n      \u0394f = 2u f<sub>s<\/sub>\/(c \u2212 u)\n    <\/strong>\n  <\/div>\n\n  <h3>7.1 \uc800\uc18d \uc870\uac74\uc5d0\uc11c\uc758 \uadfc\uc0ac<\/h3>\n\n  <p>\n    \uc0b0\uc5c5\uc6a9 \ucd08\uc74c\ud30c \uc720\ub7c9\uacc4\uc5d0\uc11c\ub294 \uc77c\ubc18\uc801\uc73c\ub85c\n    \uc785\uc790 \uc18d\ub3c4\uac00 \uc74c\uc18d\ubcf4\ub2e4 \ud6e8\uc52c \uc791\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    u \u226a c\n  <\/div>\n\n  <p>\n    \ub530\ub77c\uc11c \ubd84\ubaa8\uc758 c \u2212 u\ub294 c\uc5d0 \uac00\uae5d\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    <strong>\n      \u0394f \u2248 2u f<sub>s<\/sub>\/c\n    <\/strong>\n  <\/div>\n\n  <p>\n    \uc774\ub294 \uc815\ud655\ud55c \uc2dd\uacfc \ub3d9\uc77c\ud558\ub2e4\ub294 \ub73b\uc774 \uc544\ub2c8\ub77c,\n    \uc0c1\ub300\uc801\uc73c\ub85c \uc791\uc740 \ud56d\uc744 \uc0dd\ub7b5\ud55c \uadfc\uc0ac\uc2dd\uc774\ub2e4.\n  <\/p>\n\n  <h3>7.2 \uadfc\uc0ac\uc758 \uc218\ud559\uc801 \uc758\ubbf8<\/h3>\n\n  <p>s = u\/c\ub77c\uace0 \uc815\uc758\ud558\uba74,<\/p>\n\n  <div class=\"formula\">\n    \u0394f = 2s f<sub>s<\/sub>\/(1 \u2212 s)\n  <\/div>\n\n  <p>\uc815\ud655\ud55c \ub300\uc218\uc801 \ubcc0\ud615\uc744 \uc801\uc6a9\ud558\uba74,<\/p>\n\n  <div class=\"formula\">\n    2s\/(1 \u2212 s) = 2s + 2s\u00b2\/(1 \u2212 s)\n  <\/div>\n\n  <p>\n    s\uac00 \ub9e4\uc6b0 \uc791\uc744 \ub54c \ub450 \ubc88\uc9f8 \ud56d\uc740\n    \uccab \ubc88\uc9f8 \ud56d\uc5d0 \ube44\ud574 \uc791\uc544\uc9c4\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    2s\/(1 \u2212 s) \u2248 2s\n  <\/div>\n\n  <p>\n    \ub530\ub77c\uc11c \u0394f \u2248 2u f<sub>s<\/sub>\/c\ub97c \uc5bb\ub294\ub2e4.\n  <\/p>\n\n  <!-- ============================================= -->\n\n  <h2>8. \uc2e4\uc81c \ucd08\uc74c\ud30c \uc720\ub7c9\uacc4\uc758 \uc785\uc0ac\uac01<\/h2>\n\n  <p>\n    \uc2e4\uc81c \ubc30\uad00\uc5d0\uc11c \ucd08\uc74c\ud30c \uc13c\uc11c\ub294 \uc720\uccb4 \ud750\ub984\uacfc\n    \uc77c\uc815\ud55c \uac01\ub3c4\ub97c \uc774\ub8e8\ub3c4\ub85d \uc124\uce58\ud560 \uc218 \uc788\ub2e4.\n  <\/p>\n\n  <p>\n    \ucd08\uc74c\ud30c \ube54\uacfc \uc720\uccb4 \uc774\ub3d9 \ubc29\ud5a5 \uc0ac\uc774\uc758 \uac01\ub3c4\uac00\n    \u03b8\uc774\uba74 \ucd08\uc74c\ud30c \uc9c4\ud589 \ubc29\ud5a5\uc758 \uc720\uc18d \uc131\ubd84\uc740\n    v cos\u03b8\uc774\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    u = v cos\u03b8\n  <\/div>\n\n  <p>\n    \uc774\ub97c \uc800\uc18d \ub3c4\ud50c\ub7ec \uadfc\uc0ac\uc2dd\uc5d0 \ub300\uc785\ud558\uba74,\n  <\/p>\n\n  <div class=\"formula\">\n    <strong>\n      \u0394f \u2248 (2v f<sub>s<\/sub> cos\u03b8)\/c\n    <\/strong>\n  <\/div>\n\n  <p>\uc720\uc18d\uc5d0 \ub300\ud574 \uc815\ub9ac\ud558\uba74,<\/p>\n\n  <div class=\"formula\">\n    <strong>\n      v \u2248 c\u0394f\/(2f<sub>s<\/sub>cos\u03b8)\n    <\/strong>\n  <\/div>\n\n  <div class=\"warning\">\n    <strong>\ubc29\ud5a5\uacfc \ubd80\ud638\uc5d0 \uad00\ud55c \uc8fc\uc758<\/strong>\n    <p>\n      \uc704\uc758 \uc591\uc758 \u0394f\ub294 \uc785\uc790\uac00 \uc13c\uc11c\uc5d0 \uc811\uadfc\ud558\ub294\n      \ubc29\ud5a5\uc744 \uae30\uc900\uc73c\ub85c \ud55c\ub2e4.\n      \uc785\uc790\uac00 \uc13c\uc11c\uc5d0\uc11c \uba40\uc5b4\uc9c0\uba74 \u0394f\uc758 \ubd80\ud638\uac00\n      \ubc18\ub300\uac00 \ub41c\ub2e4.\n    <\/p>\n    <p>\n      \uc2e4\uc81c \uacc4\uc0b0\uc5d0\uc11c\ub294 \uc785\uc0ac\uac01 \u03b8\uc758 \uc815\uc758\uc640\n      \uc720\uccb4 \uc18d\ub3c4\uc758 \ubc29\ud5a5\uc744 \uc77c\uce58\uc2dc\ucf1c\uc57c \ud55c\ub2e4.\n    <\/p>\n  <\/div>\n\n  <!-- ============================================= -->\n\n  <h2>9. \uc720\uc18d\uc5d0\uc11c \uccb4\uc801\uc720\ub7c9\uc73c\ub85c \ubcc0\ud658<\/h2>\n\n  <p>\n    \ub3c4\ud50c\ub7ec \ud6a8\uacfc\ub85c \uad6c\ud55c \uc18d\ub3c4\ub294 \uc5c4\ubc00\ud558\uac8c\ub294\n    \ucd08\uc74c\ud30c\ub97c \ubc18\uc0ac\ud55c \uc785\uc790\uc758 \uc18d\ub3c4\uc774\ub2e4.\n  <\/p>\n\n  <p>\n    \uc2e4\uc81c \uc720\ub7c9 \uce21\uc815\uc5d0\uc11c\ub294 \uc785\uc790\uc758 \uc774\ub3d9\uc18d\ub3c4\uac00\n    \uc720\uccb4 \ud750\ub984\uc744 \ub300\ud45c\ud55c\ub2e4\ub294 \uc870\uac74\uc774 \ud544\uc694\ud558\ub2e4.\n  <\/p>\n\n  <p>\n    \ub610\ud55c \ubc30\uad00\uc758 \uc911\uc2ec\ubd80\uc640 \ubcbd\uba74\uc5d0\uc11c\ub294 \uc720\uc18d\uc774\n    \uc11c\ub85c \ub2e4\ub974\ubbc0\ub85c \uce21\uc815\ub41c \uc18d\ub3c4\ub97c \ubc30\uad00 \ub2e8\uba74\uc758\n    \ud3c9\uade0 \uc720\uc18d\uc73c\ub85c \ubcc0\ud658\ud558\ub294 \uacfc\uc815\uc774 \ud544\uc694\ud560 \uc218 \uc788\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    \ud3c9\uade0 \uc720\uc18d = k<sub>v<\/sub> \u00d7 \uce21\uc815 \uc720\uc18d\n  <\/div>\n\n  <p>\n    \uc5ec\uae30\uc11c k<sub>v<\/sub>\ub294 \uc720\uc18d \ubd84\ud3ec\uc640\n    \uacc4\uae30 \uad6c\uc131\uc5d0 \ub530\ub978 \ubcf4\uc815\uacc4\uc218\uc774\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    <strong>Q = A \u00d7 \ud3c9\uade0 \uc720\uc18d<\/strong>\n  <\/div>\n\n  <p>\n    \uc6d0\ud615 \ubc30\uad00\uc5d0\uc11c\ub294 \ub2e4\uc74c \uad00\uacc4\ub97c \uc0ac\uc6a9\ud55c\ub2e4.\n  <\/p>\n\n  <div class=\"formula\">\n    A = \u03c0D\u00b2\/4\n  <\/div>\n\n  <div class=\"formula\">\n    <strong>Q = (\u03c0D\u00b2\/4) \u00d7 \ud3c9\uade0 \uc720\uc18d<\/strong>\n  <\/div>\n\n  <!-- ============================================= -->\n\n  <h2>10. \ud604\uc7a5 \uc801\uc6a9\uacfc \uc8fc\uc694 \uc624\ucc28 \uc694\uc778<\/h2>\n\n  <table>\n    <thead>\n      <tr>\n        <th>\ud56d\ubaa9<\/th>\n        <th>\ud2b9\uc131<\/th>\n        <th>\uac80\ud1a0 \uc0ac\ud56d<\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr>\n        <td>\uce21\uc815 \uc6d0\ub9ac<\/td>\n        <td>\ubc18\uc0ac\ud30c\uc758 \uc8fc\ud30c\uc218 \ubcc0\ud654<\/td>\n        <td>\uc1a1\uc2e0\u00b7\uc218\uc2e0 \uc8fc\ud30c\uc218 \uac80\ucd9c<\/td>\n      <\/tr>\n      <tr>\n        <td>\ubc18\uc0ac\uccb4<\/td>\n        <td>\uae30\ud3ec \ubc0f \uace0\uccb4 \uc785\uc790<\/td>\n        <td>\ucda9\ubd84\ud55c \ubc18\uc0ac \uc2e0\ud638 \ud655\ubcf4<\/td>\n      <\/tr>\n      <tr>\n        <td>\uc74c\uc18d<\/td>\n        <td>\uc720\uccb4 \ubb3c\uc131\uc5d0 \ub530\ub77c \ubcc0\ud654<\/td>\n        <td>\uc628\ub3c4\u00b7\uc870\uc131 \ubcc0\ud654 \uace0\ub824<\/td>\n      <\/tr>\n      <tr>\n        <td>\uc124\uce58 \uac01\ub3c4<\/td>\n        <td>cos\u03b8 \ud56d\uc5d0 \uc601\ud5a5<\/td>\n        <td>\ucd08\uc74c\ud30c \uacbd\ub85c\uc640 \uc720\uccb4 \ubc29\ud5a5<\/td>\n      <\/tr>\n      <tr>\n        <td>\uc720\uc18d \ubd84\ud3ec<\/td>\n        <td>\ubc30\uad00 \uc704\uce58\ubcc4 \uc720\uc18d \ucc28\uc774<\/td>\n        <td>\ud3c9\uade0 \uc720\uc18d \ubcf4\uc815<\/td>\n      <\/tr>\n      <tr>\n        <td>\uc801\uc6a9 \uc720\uccb4<\/td>\n        <td>\uc785\uc790\u00b7\uae30\ud3ec\uac00 \uc788\ub294 \uc561\uccb4<\/td>\n        <td>\uc624\uc5fc\uc218, \ud3d0\uc218, \uc2ac\ub7ec\ub9ac \ub4f1<\/td>\n      <\/tr>\n      <tr>\n        <td>\ud55c\uacc4<\/td>\n        <td>\uae68\ub057\ud55c \uc561\uccb4\uc5d0\uc11c \ubc18\uc0ac \uc2e0\ud638 \ubd80\uc871<\/td>\n        <td>\uc804\ub2ec\uc2dc\uac04 \ubc29\uc2dd\uacfc \ube44\uad50<\/td>\n      <\/tr>\n    <\/tbody>\n  <\/table>\n\n  <!-- ============================================= -->\n\n  <h2>11. \ucd5c\uc885 \uc815\ub9ac<\/h2>\n\n  <div class=\"note\">\n    <h3>\uad00\ucc30\uc790\uac00 \uc6c0\uc9c1\uc774\uba74 \ubd84\uc790<\/h3>\n    <p>\n      \uad00\ucc30\uc790 \uc774\ub3d9\uc740 \ud30c\uba74\uacfc \uad00\ucc30\uc790\uc758 \uc0c1\ub300\uc18d\ub3c4\ub97c\n      \ubcc0\ud654\uc2dc\ud0a8\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      f\u2032 = f<sub>s<\/sub>(c \u00b1 v<sub>o<\/sub>)\/c\n    <\/div>\n\n    <h3>\uc74c\uc6d0\uc774 \uc6c0\uc9c1\uc774\uba74 \ubd84\ubaa8<\/h3>\n    <p>\n      \uc74c\uc6d0 \uc774\ub3d9\uc740 \ub9e4\uc9c8 \uc18d\uc5d0\uc11c \ubc29\ucd9c\ub418\ub294 \ud30c\uba74 \uc0ac\uc774\uc758\n      \uac70\ub9ac\ub97c \ubcc0\ud654\uc2dc\ud0a8\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      f\u2032 = f<sub>s<\/sub>c\/(c \u2213 v<sub>s<\/sub>)\n    <\/div>\n\n    <h3>\ubc18\uc0ac\ud615 \ucd08\uc74c\ud30c \uc720\ub7c9\uacc4<\/h3>\n    <p>\n      \uc13c\uc11c\uac00 \uc1a1\uc2e0\ud55c \ud30c\ub3d9\uc744 \uc6c0\uc9c1\uc774\ub294 \uc785\uc790\uac00\n      \uc218\uc2e0\ud560 \ub54c \uccab \ubc88\uc9f8 \ub3c4\ud50c\ub7ec \ud6a8\uacfc\uac00 \ubc1c\uc0dd\ud55c\ub2e4.\n    <\/p>\n    <p>\n      \uc785\uc790\uac00 \ubc18\uc0ac\ud30c\uc758 \ub4f1\uac00 \uc74c\uc6d0\uc73c\ub85c \uc791\uc6a9\ud558\uba74\uc11c\n      \ub450 \ubc88\uc9f8 \ub3c4\ud50c\ub7ec \ud6a8\uacfc\uac00 \ubc1c\uc0dd\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      f<sub>r<\/sub> =\n      f<sub>s<\/sub>(c + u)\/(c \u2212 u)\n    <\/div>\n\n    <div class=\"formula\">\n      <strong>\n        \u0394f \u2248 2u f<sub>s<\/sub>\/c\n      <\/strong>\n    <\/div>\n  <\/div>\n\n  <p>\n    <strong>\n      \ub3c4\ud50c\ub7ec \ucd08\uc74c\ud30c \uc720\ub7c9\uacc4\ub294 \uc720\uc18d\uc744 \uc9c1\uc811 \uce21\uc815\ud558\uc9c0 \uc54a\ub294\ub2e4.\n      \uc6c0\uc9c1\uc774\ub294 \uc785\uc790\uc5d0\uc11c \ubc18\uc0ac\ub418\ub294 \ucd08\uc74c\ud30c\uc758\n      \uc8fc\ud30c\uc218 \ubcc0\ud654\ub7c9\uc744 \uce21\uc815\ud55c \ud6c4,\n      \uc785\uc790\uc758 \uc774\ub3d9\uc18d\ub3c4\uc640 \ubc30\uad00 \ud3c9\uade0 \uc720\uc18d\uc744 \ucd94\uc815\ud558\uc5ec\n      \uccb4\uc801\uc720\ub7c9\uc744 \uc0b0\ucd9c\ud55c\ub2e4.\n    <\/strong>\n  <\/p>\n\n  <p class=\"small\">\n    \ud559\uc2b5 \ubc94\uc704: Chapter 22, Ultrasonic Flowmeters \uc911\n    \ub3c4\ud50c\ub7ec \ubc29\uc2dd\uc758 \ubb3c\ub9ac \uc6d0\ub9ac\uc640 \uc218\uc2dd \uc720\ub3c4.\n    \uc74c\ud30c\uac00 \uc815\uc9c0 \ub9e4\uc9c8\uc5d0\uc11c \uc804\ud30c\ud558\ub294 1\ucc28\uc6d0 \ubaa8\ub378\uc744\n    \uae30\ubcf8\uc73c\ub85c \ud558\uba70, \uc2e4\uc81c \uacc4\uae30\ub294 \uc785\uc0ac\uac01\u00b7\uc74c\uc18d\u00b7\uc720\uc18d \ubd84\ud3ec\n    \ub4f1\uc758 \uc601\ud5a5\uc744 \ucd94\uac00\ub85c \uace0\ub824\ud55c\ub2e4.\n  <\/p>\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\uc8fc\ud30c\uc218 \uce21\uc815 \uc2dc \ub3c4\ud50c\ub7ec \ud6a8\uacfc(Doppler Effect)\uc5d0 \ub300\ud558\uc5ec \uc124\uba85\ud558\uc2dc\uc624 https:\/\/m.blog.naver.com\/twonkang00\/222093880659 \ub3c4\ud50c\ub7ec \ud6a8\uacfc: \uad00\ucc30\uc790\uac00 \uc6c0\uc9c1\uc774\ub294 \ubb3c\uccb4\ub97c \ud5a5\ud558\uc5ec \uc804\ud30c\ub97c \ubc1c\uc0ac\ud558\uc600\uc744 \ub54c, \uad00\ucc30\uc790\uc640 \uc6c0\uc9c1\uc774\ub294 \ubb3c\uccb4\uc758 \uc0c1\ub300 \uc18d\ub3c4\uc5d0 \ub530\ub77c \uc8fc\ud30c\uc218\uac00 \ubcc0\uacbd\ub418\ub294 \ud604\uc0c1. \ubb3c\uccb4\uac00 \uad00\ucc30\uc790\ub97c \ud5a5\ud558\uc5ec \ub2e4\uac00\uc62c \uacbd\uc6b0\uc5d0\ub294 \ubc18\uc0ac\ub418\ub294 \uc8fc\ud30c\uc218\uac00 \ub192\uc544\uc9c0\uace0, \ubb3c\uccb4\uac00 \uad00\ucc30\uc790\ub97c \ub5a0\ub098 \uba40\uc5b4\uc9c8 \uacbd\uc6b0\uc5d0\ub294 \ubc18\uc0ac\ub418\ub294 \uc8fc\ud30c\uc218\uac00 \ub0ae\uc544\uc9c4\ub2e4. \uc0ac\uc6a9 \uc608\uc2dc: \ucc28\ub7c9\uc758 \uc2a4\ud53c\ub4dc \uac74, \ub808\uc774\ub354 \ub3c4\ud50c\ub7ec \ud6a8\uacfc(Doppler Effect)\ub294 \uc5b4\ub5a4 \ud30c\ub3d9\uc758 \ud30c\ub3d9\uc6d0\uacfc [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1185],"tags":[1314,1709,1771,1710,1726],"wpgpxmaps_activity":[],"class_list":["post-6434","post","type-post","status-publish","format-standard","hentry","category-1185","tag-1314","tag-1709","tag-1771","tag-1710","tag-1726"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/6434","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/comments?post=6434"}],"version-history":[{"count":10,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/6434\/revisions"}],"predecessor-version":[{"id":9771,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/6434\/revisions\/9771"}],"wp:attachment":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/media?parent=6434"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/categories?post=6434"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/tags?post=6434"},{"taxonomy":"wpgpxmaps_activity","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/wpgpxmaps_activity?post=6434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}