{"id":209446,"date":"2024-03-21T14:08:06","date_gmt":"2024-03-21T14:08:06","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e5%aa%92%e8%b3%aa%e4%b8%ad%e3%81%ae%e5%85%89%e9%80%9f%e5%ba%a6%e3%81%ae%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%80%81%e5%bf%9c%e7%94%a8\/"},"modified":"2024-05-17T15:12:58","modified_gmt":"2024-05-17T15:12:58","slug":"%e5%aa%92%e8%b3%aa%e4%b8%ad%e3%81%ae%e5%85%89%e9%80%9f%e5%ba%a6%e3%81%ae%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%80%81%e5%bf%9c%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e5%aa%92%e8%b3%aa%e4%b8%ad%e3%81%ae%e5%85%89%e9%80%9f%e5%ba%a6%e3%81%ae%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%80%81%e5%bf%9c%e7%94%a8\/","title":{"rendered":"\u5a92\u8cea\u4e2d\u306e\u5149\u901f\u5ea6\u306e\u5f0f | \u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u5fdc\u7528"},"content":{"rendered":"<p class=\"sidekick\">\u300c\u5a92\u8cea\u4e2d\u306e\u5149\u901f\u5ea6\u300d\u306b\u3064\u3044\u3066\u306e\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u901a\u4fe1\u6280\u8853\u3084\u5149\u5b66\u6a5f\u5668\u306a\u3069\u3078\u306e\u5177\u4f53\u7684\u306a\u5fdc\u7528\u3092\u7c21\u6f54\u306b\u8aac\u660e\u3059\u308b\u8a18\u4e8b\u3002<\/p>\n<h2>\u5a92\u8cea\u4e2d\u306e\u5149\u901f\u5ea6\u306e\u5f0f | \u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u5fdc\u7528<\/h2>\n<h2>\u5b9a\u7fa9<\/h2>\n<p>\u5149\u901f\u5ea6\uff08\u307e\u305f\u306f\u5149\u901f\u3001\u82f1\u8a9e\u3067\u306f\u300cSpeed of Light\u300d\uff09\u306f\u3001\u5149\u304c\u3042\u308b\u5a92\u8cea\u3092\u901a\u904e\u3059\u308b\u3068\u304d\u306e\u4f1d\u64ad\u901f\u5ea6\u3067\u3059\u3002\u771f\u7a7a\u4e2d\u306e\u5149\u901f\u5ea6\u306f\u6b63\u78ba\u306b \\(299,792,458 \\) \u30e1\u30fc\u30c8\u30eb\u6bce\u79d2\u3068\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u5149\u304c\u4ed6\u306e\u7269\u8cea\u4e2d\u3092\u901a\u904e\u3059\u308b\u3068\u3053\u306e\u901f\u5ea6\u306f\u9045\u304f\u306a\u308a\u307e\u3059\u3002\u5a92\u8cea\u4e2d\u306e\u5149\u901f\u5ea6\u306f\u5c48\u6298\u7387\u306b\u3088\u3063\u3066\u6c7a\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>\u8a08\u7b97\u65b9\u6cd5<\/h2>\n<p>\u5a92\u8cea\u4e2d\u306e\u5149\u901f\u5ea6 \\(v\\) \u306f\u771f\u7a7a\u4e2d\u306e\u5149\u901f\u5ea6 \\(c\\) \u3068\u5a92\u8cea\u306e\u5c48\u6298\u7387 \\(n\\) \u306b\u3088\u3063\u3066\u4ee5\u4e0b\u306e\u5f0f\u3067\u8868\u3055\u308c\u307e\u3059\uff1a<\/p>\n<p>\\[v = \\frac{c}{n}\\]<\/p>\n<p>\u3053\u3053\u3067\u3001<br \/>\n&#8211; \\(c = 299,792,458 \\ \\text{m\/s}\\)\uff08\u771f\u7a7a\u4e2d\u306e\u5149\u901f\u5ea6\uff09<br \/>\n&#8211; \\(n\\) \u306f\u5a92\u8cea\u306e\u5c48\u6298\u7387<\/p>\n<p>\u5c48\u6298\u7387 \\(n\\) \u306f\u5a92\u8cea\u306e\u5149\u306e\u4f1d\u64ad\u901f\u5ea6\u306b\u5bfe\u3059\u308b\u771f\u7a7a\u4e2d\u306e\u5149\u901f\u5ea6\u306e\u6bd4\u3092\u793a\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u6c34\u306e\u5c48\u6298\u7387\u306f\u7d04 1.33 \u3067\u3059\u306e\u3067\u3001\u6c34\u4e2d\u306e\u5149\u901f\u5ea6\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3067\u304d\u307e\u3059\uff1a<\/p>\n<p>\\[v_{\\text{\u6c34}} = \\frac{299,792,458}{1.33} \\approx 225,563,852 \\ 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