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1.A triangular prism with an apex angle of Φ = 60.0o 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?

1779_theta.png

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.

1306_theta1.png

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