1. The problem statement, all variables and given/known data A parallel beam of light containing two wavelengths, λ1= 400 nm and λ2= 650 nm, enters the silicate flint glass (at a angle of 41 degrees, relative to normal) of an equilateral triangle (60 degrees at each angle) prism. At what angle, relative to the normal, does each beam leave the prism. 2. Relevant equations nair ⋅ sinθ1 = nprism ⋅ sinθ2 3. The attempt at a solution I don't get how to get the two different indices of refraction for the prism, one for each given wavelength.