54. In a graphic organizer of your choice, compare light and transverse water waves. (9.1) 55. Use Snell's law to explain why total internal reflection only occurs for waves passing from a medium with a higher index of refraction into a medium with a lower index of refraction. (9.2) 56. Explain why white light does not break down into colours when it passes through a flat piece of window glass, as it does with a prism. (9.2)