Optics Question 893

Question: 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

Options:

A) 135

B) 90

C) 120

D) 180

Show Answer

Answer:

Correct Answer: A

Solution:

[a] For I=I02 and I=I0cos2θ=I02

θ=45o

Therefore the angle through which either polaroids turned is 135(=18045)



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