A light ray is incident on a prism in air at an angle θ as shown in Fig. P. The ray is ref...

A light ray is incident on a prism in air at an angle θ as shown in Fig. P. The ray is refracted at the first surface and again at the second surface. In terms of the apex angle φ of the prism and its index of refraction n, determine the smallest value of θ for which the ray will emerge from the other side. Find this minimum θ for n = 1.4 and φ = 60 °.

Figure P: Prism of Problem