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JEE Main 2005 (AIEEE) · Polarisation

Polarisation question from JEE Main 2005 (AIEEE)

Q62JEE Main 2005 · AIEEEEasy

Polarisation

When an unpolarized light of intensity $I_0$ is incident on a polarizing sheet, the intensity of the light which does not get transmitted is

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Answer: (b)

A polarising sheet transmits the average of $I_0\cos^2\theta$ over all directions, i.e. $\dfrac{I_0}{2}$ .
Not transmitted $= I_0 - \dfrac{I_0}{2} = \dfrac{I_0}{2}$
So the answer is (b) $\dfrac{1}{2}I_0$ .

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