問題詳情

18. An optical fiber has an index of refraction, n=1.5, and diameter, d = 10.0 um. It is surrounded by vacuum (n=1.0). When light is sent into the fiber along its axis, find the minimum outside radius, R, permitted for a bend in the fiber if no light is to escape?


(A) 16.7 um,
(B) 20.0 um,
(C) 25.0 um,
(D) 30.0 um,
(E) 50.0 um.

參考答案

答案：D
難度：計算中-1
書單：沒有書單，新增