Two polaroids are placed on x-axis such that their planes are parallel to y-z plane and pass axis of these polaroids are making an angle of $45 ∘$ with x-axis and also perpendicular to each other. If an unpolarised light of intensity $I 0$ propagates along x-axis, then intensity after passing through the system of two polaroids is $K I 0 16$ . Find K.

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Detailed Solution

After passing through 1st Polaroid, intensity of light becomes $\frac{I_{0}}{2}$ as it becomes polarized. Now the pass axis of 2nd polaroid is perpendicular to the first, hence the intensity after passing through 2nd Polaroid is zero.

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