{"id":209187,"date":"2024-03-21T14:06:29","date_gmt":"2024-03-21T14:06:29","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e8%87%a8%e7%95%8c%e8%a7%92%e3%81%ae%e5%85%ac%e5%bc%8f-%e5%ae%9a%e7%be%a9%e3%80%81%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95%e3%81%a8%e5%bf%9c%e7%94%a8\/"},"modified":"2024-05-17T15:08:31","modified_gmt":"2024-05-17T15:08:31","slug":"%e8%87%a8%e7%95%8c%e8%a7%92%e3%81%ae%e5%85%ac%e5%bc%8f-%e5%ae%9a%e7%be%a9%e3%80%81%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95%e3%81%a8%e5%bf%9c%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e8%87%a8%e7%95%8c%e8%a7%92%e3%81%ae%e5%85%ac%e5%bc%8f-%e5%ae%9a%e7%be%a9%e3%80%81%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95%e3%81%a8%e5%bf%9c%e7%94%a8\/","title":{"rendered":"\u81e8\u754c\u89d2\u306e\u516c\u5f0f | \u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3068\u5fdc\u7528"},"content":{"rendered":"<p class=\"sidekick\">\u81e8\u754c\u89d2\u306e\u516c\u5f0f\u3001\u305d\u306e\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u53ca\u3073\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u901a\u4fe1\u3084\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u306e\u8f1d\u304d\u306a\u3069\u3078\u306e\u5fdc\u7528\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h2>\u81e8\u754c\u89d2\u306e\u516c\u5f0f | \u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3068\u5fdc\u7528<\/h2>\n<p>\u81e8\u754c\u89d2\uff08critical angle\uff09\u306f\u3001\u5149\u304c\u3042\u308b\u5a92\u8cea\u304b\u3089\u4ed6\u306e\u5a92\u8cea\u306b\u9032\u3080\u969b\u306b\u3001\u5168\u5185\u53cd\u5c04\u304c\u767a\u751f\u3059\u308b\u305f\u3081\u306e\u6700\u5c0f\u89d2\u5ea6\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5149\u306f\u5883\u754c\u9762\u3092\u8d85\u3048\u3066\u9032\u3080\u306e\u3067\u306f\u306a\u304f\u3001\u5143\u306e\u5a92\u8cea\u5185\u3092\u53cd\u5c04\u3057\u307e\u3059\u3002\u81e8\u754c\u89d2\u306f\u3001\u7279\u306b\u5149\u5b66\u3084\u901a\u4fe1\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u81e8\u754c\u89d2\u306e\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u305d\u3057\u3066\u305d\u306e\u5fdc\u7528\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h2>\u81e8\u754c\u89d2\u306e\u5b9a\u7fa9<\/h2>\n<p>\u81e8\u754c\u89d2\u3068\u306f\u3001\u5165\u5c04\u89d2\u304c\u7279\u5b9a\u306e\u89d2\u5ea6\u3092\u8d85\u3048\u308b\u3068\u5168\u53cd\u5c04\u304c\u767a\u751f\u3057\u3001\u5149\u304c\u5a92\u8cea\u306e\u5883\u754c\u9762\u3092\u8d85\u3048\u305a\u306b\u5b8c\u5168\u306b\u53cd\u5c04\u3059\u308b\u89d2\u5ea6\u3092\u6307\u3057\u307e\u3059\u3002\u3053\u306e\u89d2\u5ea6\u306f\u3001\u5149\u304c\u9ad8\u5c48\u6298\u7387\u306e\u5a92\u8cea\u304b\u3089\u4f4e\u5c48\u6298\u7387\u306e\u5a92\u8cea\u306b\u79fb\u52d5\u3059\u308b\u5834\u5408\u306b\u9069\u7528\u3055\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30ac\u30e9\u30b9\uff08\u6c34\u306b\u5bfe\u3059\u308b\u5c48\u6298\u7387\u304c\u7d041.5\uff09\u304b\u3089\u7a7a\u6c17\uff08\u6c34\u306b\u5bfe\u3059\u308b\u5c48\u6298\u7387\u304c\u7d041.0\uff09\u306b\u79fb\u52d5\u3059\u308b\u5834\u5408\u306e\u81e8\u754c\u89d2\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u81e8\u754c\u89d2\u306e\u8a08\u7b97\u65b9\u6cd5<\/h2>\n<p>\u81e8\u754c\u89d2\u3092\u8a08\u7b97\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u30b9\u30cd\u30eb\u306e\u6cd5\u5247\uff08Snell&#8217;s Law\uff09\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u30b9\u30cd\u30eb\u306e\u6cd5\u5247\u306f\u6b21\u306e\u3088\u3046\u306b\u8868\u3055\u308c\u307e\u3059\uff1a<\/p>\n<p>\n\\[<br \/>\nn_1 \\sin \\theta_1 = n_2 \\sin \\theta_2<br \/>\n\\]\n<\/p>\n<p>\u3053\u3053\u3067\u3001<em>n<sub>1<\/sub><\/em> \u306f\u5149\u304c\u51fa\u767a\u3059\u308b\u5a92\u8cea\u306e\u5c48\u6298\u7387\u3001<em>n<sub>2<\/sub><\/em> \u306f\u5149\u304c\u9032\u3080\u5148\u306e\u5a92\u8cea\u306e\u5c48\u6298\u7387\u3001\u03b8<sub>1<\/sub> \u306f\u5165\u5c04\u89d2\u3001\u305d\u3057\u3066 \u03b8<sub>2<\/sub> \u306f\u5c48\u6298\u89d2\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u81e8\u754c\u89d2\uff08\u03b8<sub>c<\/sub>\uff09\u306e\u8a08\u7b97\u3067\u306f\u5c48\u6298\u89d2\u304c90\u5ea6\u306b\u306a\u308b\u306e\u3067\u3001\\(\\sin \\theta_2 = 1\\) \u3068\u306a\u308a\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u81e8\u754c\u89d2\u306e\u516c\u5f0f\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n<p>\n\\[<br \/>\n\\sin \\theta_c = \\frac{n_2}{n_1}<br \/>\n\\]\n<\/p>\n<p>\u4f8b\u3092\u4f7f\u3063\u3066\u81e8\u754c\u89d2\u3092\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u4f8b\u3048\u3070\u3001\u30ac\u30e9\u30b9\uff08\u5c48\u6298\u73871.5\uff09\u304b\u3089\u7a7a\u6c17\uff08\u5c48\u6298\u73871.0\uff09\u3078\u306e\u81e8\u754c\u89d2\u3092\u8a08\u7b97\u3057\u307e\u3059\uff1a<\/p>\n<p>\n\\[<br \/>\n\\sin \\theta_c = \\frac{1.0}{1.5} = \\frac{2}{3}<br \/>\n\\]\n<\/p>\n<p>\u3057\u305f\u304c\u3063\u3066\u3001<\/p>\n<p>\n\\[<br \/>\n\\theta_c = \\arcsin \\left( \\frac{2}{3} \\right) \\approx 41.81 \u5ea6<br \/>\n\\]\n<\/p>\n<h2>\u81e8\u754c\u89d2\u306e\u5fdc\u7528\u7bc4\u56f2<\/h2>\n<p>\u81e8\u754c\u89d2\u306e\u6982\u5ff5\u306f\u591a\u5c90\u306b\u308f\u305f\u308b\u5fdc\u7528\u7bc4\u56f2\u3092\u6301\u3061\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u305d\u306e\u3044\u304f\u3064\u304b\u306e\u4f8b\u3067\u3059\uff1a<\/p>\n<h3>\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u901a\u4fe1<\/h3>\n<p>\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u901a\u4fe1\u306b\u304a\u3044\u3066\u3001\u5149\u4fe1\u53f7\u306f\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u5185\u3067\u7dcf\u53cd\u5c04\u3092\u5229\u7528\u3057\u3066\u4f1d\u9001\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u81e8\u754c\u89d2\u3092\u8d85\u3048\u308b\u89d2\u5ea6\u3067\u5149\u304c\u30d5\u30a1\u30a4\u30d0\u30fc\u306e\u30b3\u30a2\u3068\u30af\u30e9\u30c3\u30c9\u306e\u5883\u754c\u306b\u5165\u5c04\u3059\u308b\u3053\u3068\u3067\u5b9f\u73fe\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u4fe1\u53f7\u306e\u640d\u5931\u304c\u5c11\u306a\u304f\u3001\u9ad8\u901f\u304b\u3064\u9577\u8ddd\u96e2\u306e\u30c7\u30fc\u30bf\u4f1d\u9001\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u306e\u8f1d\u304d<\/h3>\n<p>\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u306e\u5149\u5b66\u7684\u7279\u6027\u3082\u81e8\u754c\u89d2\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u306e\u5c48\u6298\u7387\u306f\u975e\u5e38\u306b\u9ad8\u3044\u305f\u3081\u3001\u81e8\u754c\u89d2\u304c\u5c0f\u3055\u304f\u306a\u308a\u3001\u5149\u304c\u5185\u90e8\u3067\u591a\u91cd\u53cd\u5c04\u3059\u308b\u3053\u3068\u3067\u7279\u6709\u306e\u8f1d\u304d\u3092\u751f\u307f\u51fa\u3057\u307e\u3059\u3002<\/p>\n<h3>\u5206\u5149\u5b66<\/h3>\n<p>\u5206\u5149\u5668\u306a\u3069\u306e\u5149\u5b66\u88c5\u7f6e\u306b\u304a\u3044\u3066\u3082\u3001\u81e8\u754c\u89d2\u306f\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u7279\u5b9a\u306e\u6ce2\u9577\u306e\u5149\u3092\u9078\u5225\u307e\u305f\u306f\u5236\u5fa1\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u81e8\u754c\u89d2\u306f\u3001\u5149\u304c\u7570\u306a\u308b\u5a92\u8cea\u3092\u901a\u904e\u3059\u308b\u969b\u306e\u5165\u5c04\u89d2\u306b\u95a2\u9023\u3057\u3001\u5168\u5185\u53cd\u5c04\u304c\u767a\u751f\u3059\u308b\u89d2\u5ea6\u3092\u6307\u3057\u307e\u3059\u3002\u81e8\u754c\u89d2\u3092\u7406\u89e3\u3057\u8a08\u7b97\u3067\u304d\u308b\u3053\u3068\u306f\u3001\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u901a\u4fe1\u3084\u5b9d\u77f3\u306e\u30ab\u30c3\u30c6\u30a3\u30f3\u30b0\u3001\u305d\u3057\u3066\u3055\u307e\u3056\u307e\u306a\u5149\u5b66\u6a5f\u5668\u306e\u8a2d\u8a08\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u7686\u3055\u3093\u3082\u3001\u3053\u306e\u57fa\u672c\u6982\u5ff5\u3092\u3057\u3063\u304b\u308a\u3068\u62bc\u3055\u3048\u3066\u3001\u3055\u3089\u306b\u6df1\u3044\u5206\u91ce\u3078\u63a2\u6c42\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u81e8\u754c\u89d2\u306e\u516c\u5f0f\u3001\u305d\u306e\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u53ca\u3073\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u901a\u4fe1\u3084\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u306e\u8f1d\u304d\u306a\u3069\u3078\u306e\u5fdc\u7528\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/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":[96],"tags":[97],"class_list":["post-209187","post","type-post","status-publish","format-standard","hentry","category-96","tag-97","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- 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