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Suppose your have a linear polarizer and you are measuring the intensity at an unknown angle...

Suppose your have a linear polarizer and you are measuring the intensity at an unknown angle θ. The intensity you measure is 50% of its maximum intensity. At what angle are you measuring the intensity?

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Answer #1

This Problem can be solved by using Malus Law which states that " The Intensity of polarised light that passes through an analyser is proportional to the square of the cosine of the angle between the plane of polarisation and transmission axis of the Analyser .

is the maximum intensity .

Given that

Substituting,

Hope this Helps!!

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