A ray of light strikes the midpoint of one face of an equiangular (60°–60°–60°) glass prism (n = 1.5) at an angle of incidence of 30°.
(a) Trace the path of the light ray through the glass, and find the angles of incidence and refraction at each surface.
(b) If a small fraction of light is also reflected at each surface, find the angles of reflection at the surfaces.