Quote from Dick in The Big Giant Head Returns Again Part 1
Dick: All right. When light hits the surface of water, how can we determine the angle at which it enters... the water? Bug: That depends on the angle of incidence. Dick: No, you clod. Wait. You're right. It does depend on the angle of incidence. You've been listening. Pitman: Yeah, that determines the angle of refraction. Dick: You said "refraction!" My God, you're getting this. Please, stay with me here.