This part has slowed down. The distance AB is identical for both triangles. Make sure you agree that q1 and q2 are correctly identified. Using a good protractor, measure the angles of incidence and refraction, and calculate the unknown indices of refraction. Don't forget to measure from the normal.
Light leaves a diamond and enters water.
Given the angle shown, calculate q. 18. Find the angle at which light leaves the prism. Light passes through a block of glass with parallel sides. Light enters the prism shown, and reflects off a silvered side. The path of every light ray could be reversed.