{"id":209170,"date":"2024-03-21T14:06:23","date_gmt":"2024-03-21T14:06:23","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e3%83%9d%e3%82%a4%e3%83%b3%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%83%99%e3%82%af%e3%83%88%e3%83%ab-%e6%a6%82%e8%a6%81%e3%81%a8%e7%89%a9%e7%90%86%e7%9a%84%e6%84%8f%e5%91%b3\/"},"modified":"2024-05-17T15:08:20","modified_gmt":"2024-05-17T15:08:20","slug":"%e3%83%9d%e3%82%a4%e3%83%b3%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%83%99%e3%82%af%e3%83%88%e3%83%ab-%e6%a6%82%e8%a6%81%e3%81%a8%e7%89%a9%e7%90%86%e7%9a%84%e6%84%8f%e5%91%b3","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e3%83%9d%e3%82%a4%e3%83%b3%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%83%99%e3%82%af%e3%83%88%e3%83%ab-%e6%a6%82%e8%a6%81%e3%81%a8%e7%89%a9%e7%90%86%e7%9a%84%e6%84%8f%e5%91%b3\/","title":{"rendered":"\u30dd\u30a4\u30f3\u30c6\u30a3\u30f3\u30b0\u30d9\u30af\u30c8\u30eb | \u6982\u8981\u3068\u7269\u7406\u7684\u610f\u5473"},"content":{"rendered":"<p class=\"sidekick\">\u30dd\u30a4\u30f3\u30c6\u30a3\u30f3\u30b0\u30d9\u30af\u30c8\u30eb\u306f\u96fb\u78c1\u5834\u306e\u30a8\u30cd\u30eb\u30ae\u30fc\u306e\u6d41\u308c\u3092\u793a\u3059\u30d9\u30af\u30c8\u30eb\u91cf\u3067\u3001\u96fb\u5834\u3068\u78c1\u5834\u306e\u76f4\u4ea4\u3059\u308b\u65b9\u5411\u306b\u5411\u304b\u3046\u3002\u30a8\u30cd\u30eb\u30ae\u30fc\u4f1d\u9001\u306e\u7406\u89e3\u306b\u91cd\u8981\u3002<\/p>\n<h2>\u30dd\u30a4\u30f3\u30c6\u30a3\u30f3\u30b0\u30d9\u30af\u30c8\u30eb | \u6982\u8981\u3068\u7269\u7406\u7684\u610f\u5473<\/h2>\n<p>\u96fb\u78c1\u6c17\u5b66\u3092\u5b66\u3093\u3067\u3044\u308b\u4eba\u306b\u3068\u3063\u3066\u3001\u30dd\u30a4\u30f3\u30c6\u30a3\u30f3\u30b0\u30d9\u30af\u30c8\u30eb\u306f\u91cd\u8981\u306a\u6982\u5ff5\u306e\u4e00\u3064\u3067\u3059\u3002\u30dd\u30a4\u30f3\u30c6\u30a3\u30f3\u30b0\u30d9\u30af\u30c8\u30eb\u306f\u3001\u96fb\u78c1\u5834\u306e\u30a8\u30cd\u30eb\u30ae\u30fc\u306e\u6d41\u308c\u3092\u793a\u3059\u30d9\u30af\u30c8\u30eb\u91cf\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u30dd\u30a4\u30f3\u30c6\u30a3\u30f3\u30b0\u30d9\u30af\u30c8\u30eb\u306e\u5b9a\u7fa9\u3001\u6570\u5f0f\u3001\u305d\u3057\u3066\u305d\u306e\u7269\u7406\u7684\u610f\u5473\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30dd\u30a4\u30f3\u30c6\u30a3\u30f3\u30b0\u30d9\u30af\u30c8\u30eb\u306e\u5b9a\u7fa9<\/h2>\n<p>\u30dd\u30a4\u30f3\u30c6\u30a3\u30f3\u30b0\u30d9\u30af\u30c8\u30eb <b><i>S<\/i><\/b> \u306f\u96fb\u5834 <b><i>E<\/i><\/b> \u3068\u78c1\u5834 <b><i>B<\/i><\/b> \u3092\u7528\u3044\u3066\u5b9a\u7fa9\u3055\u308c\u307e\u3059\u3002\u6570\u5f0f\u3067\u8868\u3059\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n<p>\\[ \\mathbf{S} = \\frac{1}{\\mu_0} \\mathbf{E} \\times \\mathbf{B} \\]<\/p>\n<p>\u3053\u3053\u3067\u3001<\/p>\n<ul>\n<li><i>\\(\\mathbf{S}\\)<\/i>: \u30dd\u30a4\u30f3\u30c6\u30a3\u30f3\u30b0\u30d9\u30af\u30c8\u30eb<\/li>\n<li><i>\\(\\mathbf{E}\\)<\/i>: \u96fb\u5834\u30d9\u30af\u30c8\u30eb<\/li>\n<li><i>\\(\\mathbf{B}\\)<\/i>: \u78c1\u5834\u30d9\u30af\u30c8\u30eb<\/li>\n<li><i>\\(\\mu_0\\)<\/i>: \u771f\u7a7a\u306e\u900f\u78c1\u7387<\/li>\n<\/ul>\n<p>\u30d9\u30af\u30c8\u30eb\u306e\u5916\u7a4d (\\(\\times\\)) 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\\(|\\mathbf{S}|\\) 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