1. The problem statement, all variables and given/known data A beam of polarized light has an average intensity of 13.2 W/m2 and is sent through a polarizer. The transmission axis makes an angle of 27.5° with respect to the direction of polarization. Determine the rms value of the electric field of the transmitted beam. 2. Relevant equations 3. The attempt at a solution This is what I have done to try this problem: I used Erms = square root of: [I(4pi * 10^-7)(3 x 10^8)] I used I = Iocos^2theta I = (13.2)(cos27.5)^2 I = 10.3856 According to the homework program I am using, the answer I have gotten is not correct...I am not sure what I am doing wrong. Thanks in advance!