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[問題] 要如何證明凹凸透鏡左右兩邊焦距相等？
[ teaching ]0 留言, 推噓總分: 0
作者: alenbe - 發表於 2008/11/15 00:56(17年前)
3F→alenbe:我有嘗試用光的可逆性來證明，但是其實無法畫出平行光在左11/14 21:53
4F→alenbe:右可以有相同的焦距...　因為左進的平行光會聚在右焦點，逆11/14 21:54
5F→alenbe:行的話，只能看出右邊從焦點發出的光經過透鏡變成向左平行11/14 21:55
6F→alenbe:光，所以用光的可逆性證不出來... ="=11/14 22:00
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