1. The problem statement, all variables and given/known data A beam of light falls perpendicularly on the surface of a triangular prism. Draw the beams path through the prism. Show any necessary calculations. n = 1.5 2. Relevant equations n1sin(a) = n2sin(b) maybe, not sure tbh. 3. The attempt at a solution This is what I did to find the angles: 1.5 = sin 90°/sin(b) 1.5 sin(b) = sin 90° sin (b) = sin 90° /1.5 sin (b) = sin-1 0.66 b = 41.8° I have no idea whether I'm right or not, I asked my teacher how to do it but she did it in a hurry so I didnt understand what she was talking about.