A ray of light is incident on the left vertical face of a glass cube of refractive index n2, as shown in figure below. The plane of incidence is the plane of the page, and the cube is surrounded by liquid of refractive index n1. The largest angle of incidence 01 for which total internal reflection occurs at the top surface is (Hint; you may use sin – e) = cos(8)) n2

A light beam reflects off two parallel reflecting surfaces that are = 202 cm long and separated by a distance of s = 65.0 cm. If the beam of light enters this region as shown, with the angle 0 = 25.1°, determine the following. Ꮎ (a) the number of times the light beam reflects off the left surface Have you redrawn the figure with all angles and distances labeled? How is the entrance angle related to the angle of Incidence and the angle of reflection for the mirrors? times (b) the number of times the light beam reflects off the right surface times

A layer of oil (n = 1.45) floats on an unknown liquid. A ray of light originates in the oil and passes into the unknown liquid. The angle of incidence is 62.8 degrees, and the angle of refraction is 62.0 degrees. What is the index of refraction of the unknown liquid?

A ray of light from a coin embedded in an unknow solid undergoes total internal reflection if the angle of incidence is larger than the critical angle. The light in the figure is incident at the critical angle. (a) What is the critical angle? (b) What is the index of refraction of this solid? coin solid, n = ? 18.0 cm air, n = 1 16.0 cm