1. The problem statement, all variables and given/known data http://xs.to/image-A876_4BAF6DF1.jpg alpha = 54.6 degrees I need to calculate phase difference between E(perpendicular) and E(parallel) polarization components. 2. Relevant equations 3. The attempt at a solution Problem is I dont know any relevant equations! Can I get the phase difference from Fresnel coefficients somehow?? Or actually I dont know even how to get the polarization components calculated. So if someone could point me to right direction it would be much appreciated!