1. A beam of light is incident from air into glass as shown in the diagram. The angles of incidence and refraction are measured to be 0 = 30 and 02 = 20. Air Glass (a) What is the index of refraction of the glass? (b) What is the speed of light in the glass? 2. A beam of light passes from air into glass (n = 1.5) and then into water (n = 1.3) as shown in the diagram. The angle 01 = 30. The two interfaces shown are parallel. Determine (a) the angle of the beam in the glass 02 Air n = 1.0 Glass n = 1.5 n = 1.3 Water (b) the angle of the beam in the water 03