[SOLVED] question about light 1. The problem statement, all variables and given/known data True or False question 5. If a Young’s double-slit apparatus, having operated in air, were to be submerged in water, the fringe pattern would become less spread out. 2. Relevant equations c=f(lamda) 3. The attempt at a solution What i think they mean: does the wavelength become shorter when light is traveling in a slower medium? What i don't know is does the frequency of light stay constant regardless of the medium? If yes, then the statement is true.