question_answer

Two polaroids have their polarizing directions parallel so that the intensity of a transmitted light is maximum. The angle through which either Polaroid must be turned if the intensity is to drop by one-half is [JEE ONLINE 07-05-2012]

A) 135°

B) 90°

C) 120°

D) 180°

Correct Answer: A

Solution :

[a] For and

Therefore the angle through which either polaroid’s turned is