問題詳情
一束光束垂直入射鏡面後反射，則反射角為
(A) 180˚
(B) 90˚
(C) 45˚
(D) 0˚。
(A) 180˚
(B) 90˚
(C) 45˚
(D) 0˚。
參考答案
答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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