複選題
16. An unpolarized light is sent into three polarizing sheets (angles: \( \theta_1 \), \( \theta_2 \), \( \theta_3 \) from positive y-axis). Angles \( \theta_1 \) and \( \theta_3 \) are fixed, but angle \( \theta_2 \) is varied. The transmission intensity of the light as a function of \( \theta_2 \) is shown in the right figure.

(A)Both \( \theta_1 \) or \( \theta_3 \) are located at 90°

(B)transmission rate of the unpolarized light after sheet 1 is 1/2

(C)two sheets 1 and 3 are perpendicular to each other

(D)transmission intensity is 0 if one takes out the sheet 2

(E)transmission rate is 1/8 if \( \theta_2 = 30° \)