a. A ray of light in glass (n = 1.5) reaches a flat interface with air. For each of these situations, calculate the light's angle from the normal in the air: 10" from the normal in the glass: 10 from the surface in the glass: What is the critical angle (if any) for this situation? b. If n>n> 3, draw the ray shown (in material 1) in the other material. ni n2 113 13 c. If n>n>n2, draw the ray shown (in material 2) in the other material. d. Could a light ray in the middle layer of either picture (shown above in questions b and c) experience total internal reflection on both its top & bottom interfaces? (In other words, would either situation work as a fiber optic cable?) If yes, which one(s)? If no, why not?. Justify your answer.