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

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[IMAGE] Which is 0.707
So [IMAGE] and [IMAGE] so only one
option is correct
i.e. 18.4º
Angle rotated should be [IMAGE]