{"id":213630,"date":"2024-11-16T09:22:45","date_gmt":"2024-11-16T09:22:45","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/?p=213630"},"modified":"2024-11-16T09:22:45","modified_gmt":"2024-11-16T09:22:45","slug":"%ec%a0%84%ec%9e%90%ea%b8%b0%ed%8c%8c%ec%9d%98-%ec%97%90%eb%84%88%ec%a7%80%eb%8a%94-%ec%96%b4%eb%96%bb%ea%b2%8c-%ea%b3%84%ec%82%b0%ed%95%a0%ea%b9%8c","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ko\/%ec%a0%84%ec%9e%90%ea%b8%b0%ed%8c%8c%ec%9d%98-%ec%97%90%eb%84%88%ec%a7%80%eb%8a%94-%ec%96%b4%eb%96%bb%ea%b2%8c-%ea%b3%84%ec%82%b0%ed%95%a0%ea%b9%8c\/","title":{"rendered":"\uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0\ub294 \uc5b4\ub5bb\uac8c \uacc4\uc0b0\ud560\uae4c?"},"content":{"rendered":"<p class=\"sidekick\">\uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0 \uacc4\uc0b0 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uc138\uc694. \uac04\ub2e8\ud55c \uacf5\uc2dd\uacfc \ub2e8\uacc4\ubcc4 \uc608\uc2dc\ub85c \uc27d\uac8c \uc774\ud574\ud560 \uc218 \uc788\uac8c \uc124\uba85\ud574\ub4dc\ub9bd\ub2c8\ub2e4.<\/p>\n<h2>\uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0\ub294 \uc5b4\ub5bb\uac8c \uacc4\uc0b0\ud560\uae4c?<\/h2>\n<p>\uc804\uc790\uae30\ud30c\ub294 \uc804\uae30\uc7a5\uacfc \uc790\uae30\uc7a5\uc774 \uacf5\uac04\uc5d0\uc11c \ud30c\ub3d9\uc73c\ub85c \uc804\ud30c\ub418\ub294 \ud615\ud0dc\ub97c \ub9d0\ud569\ub2c8\ub2e4. \uc6b0\ub9ac\uac00 \uc77c\uc0c1\uc5d0\uc11c \uc811\ud558\ub294 \ube5b, X-\uc120, \ub77c\ub514\uc624\ud30c \ub4f1 \ub2e4\uc591\ud55c \uc804\uc790\uae30\ud30c\uac00 \uc788\uc73c\uba70, \ud2b9\ud788 \ube5b\uc758 \uacbd\uc6b0\ub294 \uc5d0\ub108\uc9c0\uc758 \uc804\ub2ec \ub9e4\uac1c\ub85c \ud65c\uc6a9\ub429\ub2c8\ub2e4. \uadf8\ub807\ub2e4\uba74 \uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0\ub294 \uc5b4\ub5bb\uac8c \uacc4\uc0b0\ud560 \uc218 \uc788\uc744\uae4c\uc694?<\/p>\n<h2>\uae30\ubcf8 \uac1c\ub150<\/h2>\n<p>\uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0\ub294 \uadf8 \ud30c\ub3d9\uc758 \uc138\uae30(intensity)\uc640 \ubc00\uc811\ud55c \uad00\ub828\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc804\uc790\uae30\ud30c\uc758 \uc138\uae30\ub294 \ub2e8\uc704 \uba74\uc801\ub2f9 \uc804\ub2ec\ub418\ub294 \uc5d0\ub108\uc9c0\ub97c \uc758\ubbf8\ud569\ub2c8\ub2e4. \uace0\uc804 \uc804\uc790\uae30\ud559\uc5d0\uc11c\ub294 \uc774\ub97c \ud1b5\ud574 \uc804\uc790\uae30\ud30c \uc5d0\ub108\uc9c0\ub97c \uacc4\uc0b0\ud560 \uc218 \uc788\ub294 \uc5ec\ub7ec \uac00\uc9c0 \ubc29\ubc95\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>\ud30c\ub3d9\ubc29\uc815\uc2dd\uacfc Poynting \ubca1\ud130<\/h2>\n<p>\uc804\uc790\uae30\ud30c\ub294 Maxwell \ubc29\uc815\uc2dd\uc5d0 \uc758\ud574 \uc124\uba85\ub429\ub2c8\ub2e4. \uc774 \ubc29\uc815\uc2dd\uc740 \uc2dc\uac04\uc5d0 \ub530\ub77c \ubcc0\ud558\ub294 \uc804\uae30\uc7a5 <em>E<\/em>\uc640 \uc790\uae30\uc7a5 <em>B<\/em>\ub97c \ub098\ud0c0\ub0b4\uba70, \uc774\ub7ec\ud55c \uc7a5\uc758 \uc0c1\ud638\uc791\uc6a9\uc744 \ud1b5\ud574 \uc804\uc790\uae30\ud30c\uac00 \uc804\ud30c\ub429\ub2c8\ub2e4.<\/p>\n<p>\uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0\ub97c \uacc4\uc0b0\ud560 \ub54c \uc911\uc694\ud55c \uac1c\ub150 \uc911 \ud558\ub098\ub294 <em>Poynting \ubca1\ud130<\/em>\uc785\ub2c8\ub2e4. Poynting \ubca1\ud130 <em>S<\/em>\ub294 \uc804\uc790\uae30\ud30c\uac00 \uc5d0\ub108\uc9c0\ub97c \uc804\ub2ec\ud558\ub294 \ubc29\ud5a5\uacfc \uc591\uc744 \ub098\ud0c0\ub0b4\ub294 \ubca1\ud130\uc785\ub2c8\ub2e4. Poynting \ubca1\ud130\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4:<\/p>\n<p><strong>\\(\\mathbf{S} = \\mathbf{E} \\times \\mathbf{B} \/ \\mu_0\\)<\/strong><\/p>\n<p>\uc5ec\uae30\uc11c<\/p>\n<ul>\n<li>\\(\\mathbf{E}\\): \uc804\uae30\uc7a5 \ubca1\ud130<\/li>\n<li>\\(\\mathbf{B}\\): \uc790\uae30\uc7a5 \ubca1\ud130<\/li>\n<li>\\(\\mu_0\\): \uc790\uc720 \uacf5\uac04\uc758 \ud22c\uc790\uc728 (\uc218\uce58\uc801\uc73c\ub85c \\(4\\pi \\times 10^{-7}\\ \\text{N\/A}^2\\))<\/li>\n<\/ul>\n<p>Poynting \ubca1\ud130\uc758 \ud06c\uae30\ub294 \uc804\uc790\uae30\ud30c\uc758 \uc138\uae30, \uc989 \ub2e8\uc704 \uba74\uc801\ub2f9 \uc804\ub2ec\ub418\ub294 \uc5d0\ub108\uc9c0\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/p>\n<h2>\ud3c9\uade0 \uc5d0\ub108\uc9c0 \ubc00\ub3c4<\/h2>\n<p>\uc804\uc790\uae30\ud30c\ub294 \uc804\uae30\uc7a5\uacfc \uc790\uae30\uc7a5 \uc0ac\uc774\uc758 \uc5d0\ub108\uc9c0 \ubcc0\ud658\uc744 \ud1b5\ud574 \uc5d0\ub108\uc9c0\ub97c \uc804\ub2ec\ud569\ub2c8\ub2e4. \uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0 \ubc00\ub3c4\ub97c \uacc4\uc0b0\ud558\uae30 \uc704\ud574 \uc804\uae30\uc7a5\uacfc \uc790\uae30\uc7a5 \uac01\uac01\uc758 \uc5d0\ub108\uc9c0 \ubc00\ub3c4\ub97c \ub354\ud569\ub2c8\ub2e4. \ud3c9\uade0 \uc5d0\ub108\uc9c0 \ubc00\ub3c4(u)\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc8fc\uc5b4\uc9d1\ub2c8\ub2e4:<\/p>\n<p><strong>\\(u = \\frac{1}{2} (\\epsilon_0 E^2 + \\frac{B^2}{\\mu_0})\\)<\/strong><\/p>\n<p>\uc5ec\uae30\uc11c<\/p>\n<ul>\n<li>\\(\\epsilon_0\\): \uc790\uc720 \uacf5\uac04\uc758 \uc720\uc804\uc728 (\uc218\uce58\uc801\uc73c\ub85c \\(8.854 \\times 10^{-12}\\ \\text{F\/m}\\))<\/li>\n<li>\\(E\\): \uc804\uae30\uc7a5\uc758 \ud06c\uae30<\/li>\n<li>\\(B\\): \uc790\uae30\uc7a5\uc758 \ud06c\uae30<\/li>\n<li>\\(\\mu_0\\): \uc790\uc720 \uacf5\uac04\uc758 \ud22c\uc790\uc728<\/li>\n<\/ul>\n<p>\uc774 \uc2dd\uc740 \uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0\uac00 \uc804\uae30\uc7a5\uacfc \uc790\uae30\uc7a5\uc5d0 \uac01\uac01 \uc5b4\ub5bb\uac8c \ubd84\ud3ec\ub418\uc5b4 \uc788\ub294\uc9c0\ub97c \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/p>\n<h2>\uc804\uc790\uae30\ud30c \uc5d0\ub108\uc9c0 \uacc4\uc0b0 \uc608\uc2dc<\/h2>\n<p>\uc790, \uac04\ub2e8\ud55c \uc608\ub97c \ud1b5\ud574 \uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0\ub97c \uacc4\uc0b0\ud574\ubd05\uc2dc\ub2e4. \uc608\ub97c \ub4e4\uc5b4 \ub2e8\uc77c \uc8fc\ud30c\uc218\uc758 \ud3c9\uba74 \uc804\uc790\uae30\ud30c\ub97c \uace0\ub824\ud574\ubd05\uc2dc\ub2e4. \uc774 \uc804\uc790\uae30\ud30c\ub294 \uc804\uae30\uc7a5\uacfc \uc790\uae30\uc7a5\uc774 \uc815\ud604\ud30c\uc801(sinusoidal)\uc774\uace0 \uc11c\ub85c \uc9c1\uad50\ud569\ub2c8\ub2e4.<\/p>\n<p>\uc8fc\uc5b4\uc9c4 \uc804\uae30\uc7a5 \\(E = E_0 \\sin(\\omega t &#8211; kx)\\)\uc640 \uc774\uc5d0 \ub300\uc751\ud558\ub294 \uc790\uae30\uc7a5 \\(B = B_0 \\sin(\\omega t &#8211; kx)\\)\uac00 \uc788\uc744 \ub54c, \uc5ec\uae30\uc11c \\(E_0\\)\uc640 \\(B_0\\)\ub294 \uac01\uac01 \uc804\uae30\uc7a5\uacfc \uc790\uae30\uc7a5\uc758 \ucd5c\ub300\uac12\uc785\ub2c8\ub2e4. \uc774 \uacbd\uc6b0 Poynting \ubca1\ud130\uc758 \ud06c\uae30\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4:<\/p>\n<p><strong>\\(\\mathbf{S} = \\frac{1}{\\mu_0} E_0 B_0 \\hat{k}\\)<\/strong><\/p>\n<p>\uc774 \uc2dd\uc744 \ud1b5\ud574 \ub2e8\uc704 \uc2dc\uac04\ub2f9 \ub2e8\uc704 \uba74\uc801\uc744 \ud1b5\uacfc\ud558\ub294 \uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0\ub97c \uad6c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>\uacb0\ub860<\/h2>\n<p>\uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0\ub294 Poynting \ubca1\ud130\uc640 \ud3c9\uade0 \uc5d0\ub108\uc9c0 \ubc00\ub3c4\ub97c \ud1b5\ud574 \uacc4\uc0b0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uac1c\ub150\uc744 \uc774\ud574\ud558\uba74 \ub2e4\uc591\ud55c \uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0\ub97c \uacc4\uc0b0\ud558\uace0, \uc774\ub97c \ud65c\uc6a9\ud558\uc5ec \uc5ec\ub7ec \ubd84\uc57c\uc5d0\uc11c \uc804\uc790\uae30\ud30c\ub97c \ud6a8\uacfc\uc801\uc73c\ub85c \uc774\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc804\uc790\uae30\ud30c\ub294 \uc6b0\ub9ac\uc758 \uc0b6\uc5d0 \uae4a\uc774 \ubfcc\ub9ac \ub0b4\ub9b0 \uc911\uc694\ud55c \ud604\uc0c1\uc73c\ub85c, \uadf8 \uc5d0\ub108\uc9c0\ub97c \uc774\ud574\ud558\ub294 \uac83\uc740 \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0 \uacc4\uc0b0 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uc138\uc694. \uac04\ub2e8\ud55c \uacf5\uc2dd\uacfc \ub2e8\uacc4\ubcc4 \uc608\uc2dc\ub85c \uc27d\uac8c \uc774\ud574\ud560 \uc218 \uc788\uac8c \uc124\uba85\ud574\ub4dc\ub9bd\ub2c8\ub2e4.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[101],"tags":[],"class_list":["post-213630","post","type-post","status-publish","format-standard","hentry","category-101","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0\ub294 \uc5b4\ub5bb\uac8c \uacc4\uc0b0\ud560\uae4c?<\/title>\n<meta name=\"description\" content=\"\uc804\uc790\uae30\ud30c\uc758 \uc5d0\ub108\uc9c0 \uacc4\uc0b0 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uc138\uc694. \uac04\ub2e8\ud55c \uacf5\uc2dd\uacfc \ub2e8\uacc4\ubcc4 \uc608\uc2dc\ub85c \uc27d\uac8c \uc774\ud574\ud560 \uc218 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