QJEEM13Phb3fc: JEE Main 2013 Physics - Class 12 JEEM13Phb3fc Solution: A beam of unpolarised light of intensity I 0 is passed through…

Question

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A beam of unpolarised light of intensity

I_{0}

is passed through a polaroid

A

and then through another polaroid

B

which is oriented so that its principal plane makes an angle of

45^{\circ}

relative to that of

A

. The intensity of the emergent light is

Accepted Answer

Relation between intensities

JEE Main 2013 (Offline) Physics - Wave Optics Question 131 English Explanation

I_{r} = (\frac{I_{0}}{2}) \cos^{2} (45^{\circ}) = \frac{I_{0}}{2} \times \frac{1}{2} = \frac{I_{0}}{4}

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