SMC/Physics 23/Fall 2023/Faridian/Exam 3 2. (20 points) A light ray enters a block of plastic and travels along the path shown. a. By considering the behavior of the ray at point P, determine the speed of light in the plastic. 53 P 37 f Air Plastic - b. Determine what will happen to the light ray when it reaches point Q, using the diagram to illustrate your conclusion. c. There is an air bubble in the plastic block that happens to be shaped like a plano-convex lens as shown below. Sketch what happens to parallel rays of light that strike this air bubble. Explain your reasoning. Plastic Air