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Brewster's Angle

1. The optic ...

Question

The optic axes of two Polaroids are inclined at an angle of 45° with each other.unpolarised light of intensity I° being incident on the first polaroid emerges from the second polaroid. What is the intensity of the emergent light?

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Solution

Firstly the unpolarised light I° passes through the first polaroid ,then intensity of the polarised light become I° /2 ,after passing through the second polaroid I° /2 will be multiplied by cos^2( θ)=1/2 (by malus law),so final intensity will be I°/4 (answer)

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