Now try changing the materials at the bottom only. 2.c What effect does increasing the index of refraction of the bottom material have? 2.d Does the ray bend toward or away from the normal? Is that always true when air is the top material? Now try changing both the materials. 2.e What patterns do you notice? 2.f How can you make the ray bend away from the normal? Now set up the materials as water on top and air on the bottom. Move the laser back and forth