Question

An unpolarised beam of intensity I0 is incident on a pair of nicols making angle of 60° with each other. The intensity of right emerging from the pair is

Answer 1

Explanation:

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Answer 2

After passing from first nicol the intensity will be reduce by 50%

I  =   I′/2

​Then it will pass from second nicol

According to Malus' law ,

I = I′ cos^2θ

I = I′/2 x cos^2 60°

 = I′/2 x 1/4

 = I′/8

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