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範例 27：斯奈爾折射定律 |
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你知道什麼是「斯奈爾折射定律」嗎？接下來為你說明以費馬最小時間原理決定斯奈爾折射定律。
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《 解答 》 |
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在界面之上，光速是 ，在界面之下光速是 ，光自 出發，走向 ，
費馬最小時間要求
是最小值。對 微分要等於0
得到
其中  ， 分別是入射角和折射角，這就是斯奈爾折射定律。
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About
This document |
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This document
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translator Version 2K.1beta (1.47)
Copyright © 1993, 1994, 1995, 1996, Nikos
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Copyright © 1997, 1998, 1999, Ross
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The translation was initiated by Shu Cheng-chou
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