In Chapter 23, we discussed the polarization of light by reflection. Figure P24.87 shows light that is both reflected and refracted as it passes from air into the glass with n = 1.60. The incident light is unpolarized, containing components with the electric field perpendicular to the plane of the drawing and parallel to this plane. When the reflected and refracted rays are precisely perpendicular, the reflected ray will be purely linearly polarized, with E S acted and refracted rays are precisely perpendicular to the plane of the drawing as indicated. Find the angle of the incident ray for which the refracted and reflected rays are perpendiculars. It is called Brewster’s angle 

Figure P24.87