You have linearly polarized light of intensity 1 W/m² with the electric field along the y-axis. You have 4 filters whose polarization axes make the following angles with the y-axis: 10°, 25°, 30°, and 50°. You can put them in any order, but the incident light must go through all four of them.
Find the arrangement order such that you MINIMIZE the amount of transmitted light, and find this minimum intensity.