1. The problem statement, all variables and given/known data An unpolarised light beam is shone horizontally through a cubic tank filled with weakly scattering fluid. Can vertically polarized light leave through the sides that are parallel to the beam’s propagation direction? 2. Relevant equations 3. The attempt at a solution My thinking is that they can. If the fluid is weakly scattering the chances are that a small amount of light would be able to leave through the top sides and that this would have vertically polarised light. Any ideas on how to approach this problem?