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Polarization of Light

Problem 5.163

A Nicol prism is placed in the way of partially polarized beam of light. When the prism is turned from the position of maximum transmission through an angle φ=60∘,\varphi=60^{\circ}, the intensity of transmitted light decreased by a factor of η=3.0.\eta=3.0 . Find the degree of polarization of incident light.

Reveal Answer
P=(η−1)/(1−ηcos⁡2φ)=0.8P=(\eta-1) /(1-\eta \cos 2 \varphi)=0.8
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