Suppose a ray strikes the left face of the prism in Fig. 23–64 at 45.0° as shown, but is totally internally reflected at the opposite side. If the apex angle (at the top) is 0 = 65.0°, what can you say about the index of refraction of the prism? Light is incident on an equilateral glass prism at a 45.0° angle to one face, Fig. 23–64. Calculate the angle at which light emerges from the opposite face. Assume that n = 1.54. 45.0° FIGURE 23-64 Problems 80 and 81.

Suppose a ray strikes the left face of the prism in Fig. 23–64 at 45.0° as shown, but is totally internally reflected at the opposite side. If the apex angle (at the top) is 0 = 65.0°, what can you say about the index of refraction of the prism? Light is incident on an equilateral glass prism at a 45.0° angle to one face, Fig. 23–64. Calculate the angle at which light emerges from the opposite face. Assume that n = 1.54. 45.0° FIGURE 23-64 Problems 80 and 81.