Question: A piece of glass with a flat surface is at the bottom of a tank of water. If a ray of light traveling in the glass is incident on the interface with the water at an angle with respect to the normal that is greater than 62.5? , no light is refracted into the water. For smaller angles of incidence, part of the ray is refracted into the water.
Part A: If the light has wavelength 470nm in the glass, what is the wavelength of the light in the water?
I need help to determine the wavelength of the light in the water.