Chapter 25, Problem 38P

25.6 Polarization and light reflection

* Unpolarized light passes through three polarizers The second makes an angle of $25°$ relative to the first, and the third makes an angle of $45°$ relative to the first. The intensity of light measured after the third polarizer is ${\text{40 W/m}}^{\text{2}}$. Determine the intensity of the unpolarized light incident on the first polarizer Indicate any assumptions that you made.