Unpolarized light of intensity 32 `Wm^(-3)` passes through three polarizers such that the transmission axis of the last polarizer is crossed with the first. If the intensity of the emerging light is `3 Wm^(-2)`, what is the angle between the transmission axces of the first two polarizers ? At what angle will the transmitted intensity be maximum ?

Options

A. `45^(@)`
B. `60^(@)`
C. `30^(@)`
D. zero

Answer

C

Explanation

`I_(1)= (I_(0))/(2), I_(2)= I_(1) cos^(2)theta, I_(3)= (I_(0))/(2)cos^(2)theta sin^(2)theta`