1. The problem statement, all variables and given/known data In order to decrease the intensity of a beam of unpolarized light to 10% of its original intensity using two polarizers, what is the required value of θ, the angle between the transmission axes of the two polarizers? 2. Relevant equations tanθB=n2/n1 3. The attempt at a solution tanθB=n2/n1 I'm not sure how to do this. I read the section on polarization and there are no examples in the book.