試題詳解

15. A light from medium A with refractive index (n_A) enters medium B and medium C with refractive index, n_B and nC respectively. Which of the followings is correct?

(A) n_A ＞ n_B ＞ n_C
(B) n_A ＞ n_C ＞ n_B
(C) n_B ＞ n_C ＞ n_A
(D) n_B ＞ n_A ＞ n_C
(E) n_C ＞ n_A ＞ n_B