The intensity of transmitted light when a polaroid sheet is placed between two crossed polaroids at 22.5^\circ from the polarisation axis of one of the polaroids is (I0 is the intensity of polarised l

Question

The intensity of transmitted light when a polaroid sheet is placed between two crossed polaroids at 22.5^\circ from the polarisation axis of one of the polaroids is (I0 is the intensity of polarised light after passing through the first polaroid):

Vishal Gupta · Accepted Answer

C. First polaroid → I0. The middle sheet at 22.5^\circ: I0\cos^2 22.5^\circ. The last, crossed with the first, is at 67.5^\circ to the middle sheet: I0\cos^2 22.5^\circ\cos^2 67.5^\circ = I0\left(\frac{\sin45^\circ}{2}\right)^2 = \frac{I0}{8}.

Wave Optics

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