The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at 22.5^ from the polarization axis of one of the polaroid, is ( I _0 is the intensity of polarised light after passing through the first polaroid):

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Correct answer: C. I _0 8

Initially two polaroids are crossed i.e. 90^ After passing from first polaroid intensity is I _0 aligned & I _0 4 ^2(2 ) \ & I _0 4 ^2(2 22.5) \ & I _0 8 aligned

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