Hello; For my coursework I am studying how changing the wavelength of a beam of light affects the index of refraction. According to the results I have collected, wavelength and refractive index are inversely proportional. However, my physics teacher says that this should not be the case. Assuming my physics teacher is correct, why do my experiments show this? I can't find any sources which tell me the answer, but if I am correct in that they are supposed to be inversely proportional, is there a general formula linking wavelength with the index of refraction? Thanks.