1. The problem statement, all variables and given/known data Light is incident on an equilateral glass prism at a 45.0 °angle to one face. Calculate the angle at which light emerges from the opposite face. Assume that n = 1.49. θ4 = ? 2. Relevant equations n1 * sin θ1 = n2 * sin θ2 3. The attempt at a solution n1 = 1.00 (air) n2 = 1.49 sin 45° = 0.707 n1 * sinθ1 / 1.49 = sin θ2 sin θ 2 = 0.474 θ2 = 28.33° I'm having trouble finding θ3. n2 = 1.49 θ2 = 28.33° n3 = 1.49 θ3 = ??