A light source with an intensity I, is shining on a sequence of polarizers. What will be the intensity on the other side of the first polarizer? Now imagine that you place a second polarizer behind that one, and orient it so that its polarization direction is 90 away from the first. What will be the intensity on the other side of this second polarizer? Now place a third polarizer in between those two, but tilt it so that the angle is 30 with respect to the first polarizer (which means 60 with respect to the second). What is the intensity of light on the far side?