1. Open the simulation and select Intro mode (default: air to water). 2. Observe and answer the following using the protractor and intensity meter: a. What happens when the light ray reaches the air-water boundary? When the light ray reaches the air-water boundary, part of the ray bends as it enters the water, and a small portion reflects into the air. The ray bends toward the normal because water is denser. b. Is there a difference in light intensity before and after the boundary? Explain. Yes, there is a difference in light before and after the boundary. The intensity decreases slightly after the boundary because some of the light is reflected at the surface, and not all the light energy is absorbed by the water. c. How do the incident and refracted angles compare to each other and to the normal line? The incident and refracted angles compare to each other and to the normal line 3. Adjust the light source by dragging the handle clockwise and counterclockwise. Describe how the behavior of the rays changes as you change the angle of incidence. 4. Switch the light source from ray mode to wave mode. Describe the differences you1