1. The problem statement, all variables and given/known data "Light of wavelength 0.527 µm (in air) enters the water in a swimming pool. The speed of light in water is 0.700 times the speed in air. What is the wavelength of the light in water?" 2. Relevant equations v = c /n, where n = 1.33 ,the index of refraction 3. The attempt at a solution The wavelength of light in air is given. [tex]\lambda[/tex]=0.527 I looked up the speed of light in air -- 299704644.54 m/s I also know that the speed of light in water is 0.700(299704644.54) I am not sure how to relate these numbers to v = c/n though, or the equation to use to find the [tex]\lambda[/tex] of light in water. Can anyone offer any insight? Thanks!