You have a triangular prism made of glass of refractive index 1.60, with angles of 30-60-90. The short side is oriented vertically.

You have a triangular prism made of glass of refractive index 1.60, with angles of 30∘-60∘-90∘. The short side is oriented vertically. A horizontal ray hits the middle of the slanted side of the prism (Figure 1) . Determine angles 1, 2, 3, and 4 separately. Please show all work for this problem. Thank you.