{"id":208621,"date":"2024-03-21T14:06:23","date_gmt":"2024-03-21T14:06:23","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%ed%8f%ac%ec%9d%b8%ed%8c%85-%ec%a0%95%eb%a6%ac-%ec%a0%95%ec%9d%98-%ea%b3%84%ec%82%b0-%eb%b0%8f-%ec%a0%81%ec%9a%a9\/"},"modified":"2024-05-15T11:30:20","modified_gmt":"2024-05-15T11:30:20","slug":"%ed%8f%ac%ec%9d%b8%ed%8c%85-%ec%a0%95%eb%a6%ac-%ec%a0%95%ec%9d%98-%ea%b3%84%ec%82%b0-%eb%b0%8f-%ec%a0%81%ec%9a%a9","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ko\/%ed%8f%ac%ec%9d%b8%ed%8c%85-%ec%a0%95%eb%a6%ac-%ec%a0%95%ec%9d%98-%ea%b3%84%ec%82%b0-%eb%b0%8f-%ec%a0%81%ec%9a%a9\/","title":{"rendered":"\ud3ec\uc778\ud305 \uc815\ub9ac | \uc815\uc758, \uacc4\uc0b0 \ubc0f \uc801\uc6a9"},"content":{"rendered":"<p class=\"sidekick\">\ud3ec\uc778\ud305 \uc815\ub9ac\ub294 \uc804\uc790\uae30\uc7a5\uc5d0\uc11c \uc5d0\ub108\uc9c0\uc758 \ud750\ub984\uacfc \ubd84\ud3ec\ub97c \uc218\ud559\uc801\uc73c\ub85c \uc124\uba85\ud558\uba70 \uc804\uc790\uae30\ud559\uc758 \uc911\uc694\ud55c \uac1c\ub150\uc785\ub2c8\ub2e4.<\/p>\n<h2>\ud3ec\uc778\ud305 \uc815\ub9ac\ub780 \ubb34\uc5c7\uc778\uac00?<\/h2>\n<p>\ud3ec\uc778\ud305 \uc815\ub9ac(Poynting&#8217;s theorem)\ub294 \uc804\uc790\uae30\ud559\uc5d0\uc11c \ub9e4\uc6b0 \uc911\uc694\ud55c \uac1c\ub150 \uc911 \ud558\ub098\ub85c, \uc804\uc790\uae30\uc7a5 \ub0b4\uc5d0\uc11c \uc5d0\ub108\uc9c0\uac00 \uc5b4\ub5bb\uac8c \uc774\ub3d9\ud558\ub294\uc9c0\ub97c \uc124\uba85\ud569\ub2c8\ub2e4. \uc774 \uc774\ub860\uc740 1884\ub144 \uc874 \ud5e8\ub9ac \ud3ec\uc778\ud305\uc5d0 \uc758\ud574 \ucc98\uc74c \uc18c\uac1c\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \ud3ec\uc778\ud305 \uc815\ub9ac\ub294 \uc804\uae30\uc7a5\uacfc \uc790\uae30\uc7a5\uc758 \uc0c1\ud638\uc791\uc6a9\uc744 \ud1b5\ud574 \uc5d0\ub108\uc9c0\uac00 \uc5b4\ub5bb\uac8c \ud750\ub974\ub294\uc9c0\ub97c \uc218\ud559\uc801\uc73c\ub85c \ub098\ud0c0\ub0b4 \uc90d\ub2c8\ub2e4.<\/p>\n<h2>\ud3ec\uc778\ud305 \uc815\ub9ac\uc758 \uc815\uc758<\/h2>\n<p>\ud3ec\uc778\ud305 \uc815\ub9ac\ub294 \uc804\uc790\uae30\uc7a5 \ub0b4\uc758 \uc5d0\ub108\uc9c0 \ubcf4\uc874\uc744 \uae30\uc220\ud569\ub2c8\ub2e4. \uc774 \uc815\ub9ac\ub294 \uc5d0\ub108\uc9c0\uac00 \uc5b4\ub5bb\uac8c \uc804\uc790\uae30\uc7a5\uc73c\ub85c\ubd80\ud130 \ubb3c\uc9c8\ub85c \uc804\ub2ec\ub418\ub294\uc9c0\ub97c \ub098\ud0c0\ub0b4\ub294 \ubc29\uc815\uc2dd\uc744 \ud3ec\ud568\ud569\ub2c8\ub2e4. \ud3ec\uc778\ud305 \ubca1\ud130(S)\ub294 \uc804\uae30\uc7a5(E)\uacfc \uc790\uae30\uc7a5(H)\uc758 \ubca1\ud130\uacf1\uc73c\ub85c \uc815\uc758\ub429\ub2c8\ub2e4. \uc218\ud559\uc801\uc73c\ub85c \ud3ec\uc778\ud305 \ubca1\ud130\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \ud45c\ud604\ub429\ub2c8\ub2e4:<\/p>\n<p>\\[ \\vec{S} = \\vec{E} \\times \\vec{H} \\]<\/p>\n<p>\uc5ec\uae30\uc11c, \\(\\vec{S}\\)\ub294 \uc5d0\ub108\uc9c0 \ud750\ub984\uc758 \ubc00\ub3c4\uc640 \ubc29\ud5a5\uc744 \ub098\ud0c0\ub0b4\ub294 \ubca1\ud130\uc774\uba70, SI \ub2e8\uc704\ub294 \uc640\ud2b8\/\uc81c\uacf1\ubbf8\ud130(W\/m\u00b2)\uc785\ub2c8\ub2e4. \uc774 \ubca1\ud130\uc758 \ubc29\ud5a5\uc740 \uc5d0\ub108\uc9c0\uac00 \uc804\ub2ec\ub418\ub294 \ubc29\ud5a5\uc744, \uadf8 \ud06c\uae30\ub294 \ub2e8\uc704 \uba74\uc801\ub2f9 \uc804\ub2ec\ub418\ub294 \uc5d0\ub108\uc9c0\uc758 \ube44\uc728\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/p>\n<h2>\ud3ec\uc778\ud305 \uc815\ub9ac\uc758 \uacc4\uc0b0<\/h2>\n<p>\ud3ec\uc778\ud305 \ubca1\ud130\uc758 \uacc4\uc0b0\uc744 \ud1b5\ud574, \uc5d0\ub108\uc9c0\uac00 \uc2dc\uc2a4\ud15c \ub0b4\uc5d0\uc11c \uc5b4\ub5bb\uac8c \ubd84\ud3ec\ud558\ub294\uc9c0\ub97c \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uacc4\uc0b0 \uc608\ub97c \ub4e4\uc5b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uac00\uc815\ud558\uc790\uba74, \uacf5\uac04\uc758 \ud2b9\uc815 \uc9c0\uc810\uc5d0\uc11c \uc804\uae30\uc7a5\uacfc \uc790\uae30\uc7a5\uc774 \uac01\uac01 \\(\\vec{E} = (1, 0, 0)\\) V\/m, \\(\\vec{H} = (0, 1, 0)\\) A\/m\ub85c \uc8fc\uc5b4\uc84c\ub2e4\uace0 \uac00\uc815\ud574\ubd05\uc2dc\ub2e4. \uc774 \ub54c, \ud3ec\uc778\ud305 \ubca1\ud130\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4:<\/p>\n<p>\\[ \\vec{S} = \\vec{E} \\times \\vec{H} = (1, 0, 0) \\times (0, 1, 0) = (0, 0, 1) \\text{W\/m}^2 \\]<\/p>\n<p>\uc774 \uacc4\uc0b0\uc740 \uc5d0\ub108\uc9c0\uac00 z \ubc29\ud5a5\uc73c\ub85c \ud750\ub974\uace0 \uc788\uc74c\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4. \uc989, \uc774 \ubc29\uc815\uc2dd\uc744 \uc0ac\uc6a9\ud558\uba74 \uc8fc\uc5b4\uc9c4 \uc804\uc790\uae30\uc7a5 \uc870\uac74\uc5d0\uc11c \uc5d0\ub108\uc9c0\uac00 \uc5b4\ub514\ub85c, \uc5bc\ub9c8\ub098 \ub9ce\uc774 \ud750\ub974\ub294\uc9c0\ub97c \uacc4\uc0b0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>\ud3ec\uc778\ud305 \uc815\ub9ac\uc758 \uc801\uc6a9<\/h2>\n<p>\ud3ec\uc778\ud305 \uc815\ub9ac\ub294 \ub2e4\uc591\ud55c \uacfc\ud559 \ubc0f \uacf5\ud559 \ubd84\uc57c\uc5d0\uc11c \uc751\uc6a9\ub429\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc804\uc790\uae30\ud30c\uc758 \uc804\ud30c, \ub77c\ub514\uc624\ud30c\uc758 \uc804\uc1a1, \uc2ec\uc9c0\uc5b4 \ud0dc\uc591 \uc5d0\ub108\uc9c0\uc758 \uc804\uc1a1 \ub4f1\uc744 \uc774\ud574\ud558\ub294 \ub370\uc5d0 \ud544\uc218\uc801\uc785\ub2c8\ub2e4. \ub610\ud55c, \uc774 \uc815\ub9ac\ub294 \uc5d0\ub108\uc9c0\uac00 \uc5b4\ub5bb\uac8c \uae30\uae30\ub4e4 \uc0ac\uc774\uc5d0\uc11c \uc804\ub2ec\ub418\ub294\uc9c0\ub97c \uc774\ud574\ud558\ub294 \ub370\uc5d0\ub3c4 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc804\ub825\uc120\uc744 \ud1b5\ud574 \uc804\ub825\uc774 \uc5bc\ub9c8\ub098 \ud6a8\uc728\uc801\uc73c\ub85c \uc804\uc1a1\ub418\uace0 \uc788\ub294\uc9c0\ub97c \uacc4\uc0b0\ud560 \ub54c \uc720\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n<p>\ud3ec\uc778\ud305 \uc815\ub9ac\ub294 \ub610\ud55c \ube5b\uacfc \ubb3c\uc9c8\uc758 \uc0c1\ud638\uc791\uc6a9\uc744 \uc774\ud574\ud558\ub294 \ub370 \uc911\uc694\ud55c \ub3c4\uad6c\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ub808\uc774\uc800 \uae30\uc220\uc5d0\uc11c\ub294 \ub808\uc774\uc800 \ube5b\uc758 \uc5d0\ub108\uc9c0\uac00 \ub300\uc0c1\uc5d0 \uc5b4\ub5bb\uac8c \uc804\ub2ec\ub418\ub294\uc9c0\ub97c \uc124\uba85\ud558\ub294 \ub370 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n<h2>\ub9c8\ubb34\ub9ac<\/h2>\n<p>\ud3ec\uc778\ud305 \uc815\ub9ac\ub294 \uc804\uc790\uae30\ud559\uc758 \uae30\ubcf8\uc801\uc774\uba74\uc11c\ub3c4 \uac15\ub825\ud55c \ub3c4\uad6c\uc785\ub2c8\ub2e4. \uc774 \uc815\ub9ac\ub97c \ud1b5\ud574 \uc6b0\ub9ac\ub294 \uc5d0\ub108\uc9c0\uac00 \uc804\uc790\uae30\uc7a5\uc744 \ud1b5\ud574 \uc5b4\ub5bb\uac8c \uc774\ub3d9\ud558\ub294\uc9c0\ub97c \uc815\ub7c9\uc801\uc73c\ub85c \uc774\ud574\ud560 \uc218 \uc788\uc73c\uba70, \uc774\ub294 \uacfc\ud559\uacfc \uacf5\ud559\uc758 \uc5ec\ub7ec \ubd84\uc57c\uc5d0\uc11c \uc751\uc6a9\ub429\ub2c8\ub2e4. \ub530\ub77c\uc11c \ud3ec\uc778\ud305 \uc815\ub9ac\ub97c \ubc30\uc6b0\uace0 \uc774\ud574\ud558\ub294 \uac83\uc740 \uc804\uc790\uae30\ud559\ubfd0\ub9cc \uc544\ub2c8\ub77c \ub2e4\ub978 \ub9ce\uc740 \uae30\uc220 \ubd84\uc57c\uc5d0\uc11c\ub3c4 \uc911\uc694\ud569\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud3ec\uc778\ud305 \uc815\ub9ac\ub294 \uc804\uc790\uae30\uc7a5\uc5d0\uc11c \uc5d0\ub108\uc9c0\uc758 \ud750\ub984\uacfc \ubd84\ud3ec\ub97c \uc218\ud559\uc801\uc73c\ub85c \uc124\uba85\ud558\uba70 \uc804\uc790\uae30\ud559\uc758 \uc911\uc694\ud55c \uac1c\ub150\uc785\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":[94],"tags":[95],"class_list":["post-208621","post","type-post","status-publish","format-standard","hentry","category-94","tag-95","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\/ 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