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JEE PHYSICS MCQ: WAVE OPTICS

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Application +4 | -1

An unpolarised light beam of intensity

2 I_0

is passed through a polaroid

P

and then through another polaroid

Q

which is oriented in such a way that its passing axis makes an angle of

60^{\circ}

relative to that of

P .

The intensity of the emergent light is

View answer and explanation

Correct option: A

\frac{I_0}{4}

Option A (

\frac{I_0}{4}

) is correct because the intensity is reduced by half after passing through the first polaroid, and then further reduced by

\cos^2(60°)

after passing through the second polaroid.

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