試卷名稱:91年 - 91 學士後西醫:物理#85626
年份:91年
科目:學士後西醫-物理
5.A clear sheet of polaroid is placed on top of a simmilar sheets so that their polarizing axes make an angle of
30°
with each other. The ratio of the intensity of emerging light to incident unpolarized light its .
( cos30o
,sin30o
)
(A)1/4
(B)1/3
(C)1/2
(D)3/4
(E)3/8