Solve ASAP

For each problem, you must give some sort of drawing (1 pt), and you must describe in words your process as you solve the problem (3 pts), with the remaining 6 pts for each problem for the equations, algebra, and final solution. Problem 10-Reflection & refraction: As shown below, a laser beam is sent into the system from the lower left at an angle of 20". If it hits the screen at a height of 8.5 cm, what is the refractive index of the unknown material? n =1 n = ? n= 1 8.5 cm 0-20' 10 cm 5 cm 10 cm