1. A ray of light is shone through the interface between two media. At a depth of 5 meters below the interface, the light ray has travelled 2 meters horizonally. If it had not been refracted, it would have travelled 3 meters horizonally at this depth. Find the ratio . Where n is the index of refraction of the material above the interface and ng is the index of refraction of the material below the interface. 2. Draw a raytrace diagram of an object and its reflected image in a convex mirror. 3. Using the same setup as in problem 1, find the critical angke for total internal reflection between medium 2 and medium 1.

1. A ray of light is shone through the interface between two media. At a depth of 5 meters below the interface, the light ray has travelled 2 meters horizonally. If it had not been refracted, it would have travelled 3 meters horizonally at this depth. Find the ratio . Where n is the index of refraction of the material above the interface and ng is the index of refraction of the material below the interface. 2. Draw a raytrace diagram of an object and its reflected image in a convex mirror. 3. Using the same setup as in problem 1, find the critical angke for total internal reflection between medium 2 and medium 1.