Problem 5.159

A beam of plane-polarized light falls on a polarizer which rotates about the axis of the ray with angular velocity $\omega=21 \mathrm{rad} / \mathrm{s}$. Find the energy of light passing through the polarizer per one revolution if the flux of energy of the, incident ray is equal to $\Phi_{0}$ $=4.0 \quad \mathrm{~mW}$