1. The problem statement, all variables and given/known data Light of wavelength x, in air, is incident in air on a film of oil with index of refraction n_oil = 1.45. The film of oil has thickness L, and is spread on glass with an index of refraction n_glass = 1.50. The wavelength of the light in oil will be _____ than the wavelength of the light in glass. A) greater than B) equal to C)less than 2. Relevant equations 2*n_oil*L = m*x 3. The attempt at a solution I know the answer is A, but I can't figure out why. Can someone help me out on this? Thanks.