Unpolarized light passes through two ideal polaroid sheets. the axis of the first is vertical and the axis of the second is at 37.0° to the vertical. what fraction of the incident light is transmitted?

63.78%

Explanation:

The equation that relates the angle of the polarization and the intensity of ligth transmitted is I=Io*cos²(x), where I is the intensity of the incident light, Io is the intensity of the transmitted light, and x is the angle of polarization. The fraction of incident light will be I/Io, so the answer in given by cos²(37) = 0.6378