A polarizer - analyser set is adjusted such that the intensity of light coming out of the analyser is just 10 % of the original intensity. Assuming that the polarizer - analyser set does not absorb an

Question

A polarizer - analyser set is adjusted such that the intensity of light coming out of the analyser is just 10 % of the original intensity. Assuming that the polarizer - analyser set does not absorb any light, the angle by which the analyser needs to be rotated further, to reduce the output intensity to zero, is

TestHub · Accepted Answer

I = I 0 c o s 2 θ I 0 10 = I 0 cos 2 θ C o s θ = 1 10 = 0.31 < 1 2 which is 0.707 sin - 1 ( 1 / 2 ) = 45 o and 90 o - θ < 45 o so only one option is correct i.e. 18.4 o angle rotated should be = 90 o - 71.6 o = 18.4 o

Physics - Wave Optics Question with Solution | TestHub

Options:

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