A triangular prism with an apex angle ofnbspphi 600o has

Question

1.A triangular prism with an apex angle of Φ = 60.0^o has an index of refraction n = 1.56. What is the smallest angle of incidence θ₁ for which a light ray can emerge from the other side?

2. Determine the maximum angle θ₁ for which the light rays incident on the end of the pipe in Figure are subject to total internal reflection along the walls of the pipe. Assume that the pipe has an index of refraction of 1.34 and the outside medium is air.