1. *A beam of light that is a mixture of plane polarized and unpolarized light is incident on a sheet of polaroid. The trasmitted intensity varies as the sheet is rotated, having a maximum when the transmission axis is horizontal, and a minimum when it's vertical. If the maximum intensity is three times the minimum, what fraction of the intensity of the original beam is plane polarized, and what is it's direction of polarization? 2. Relevant equations I=Imax*cos^2*theta (polarized light passing through analyzer) 3. The attempt at a solution Basically I have no idea with this one, except I'm pretty sure the answer to the last part is that its' direction of polarization is horizontal. I also just guessed and played around with the fact that with an ideal polarizer the intensity of the transmitted light is half the incident unpolarized light, so I played around with: Imin= I/2 Imax= 3*Imin = 3*I/2 = 3/2*I But that can't be right because its not a proper fraction.. Any help very much appreciated..