1. The problem statement, all variables and given/known data A film of MgF2 (n = 1.38) having thickness 1.44 x 10-5 cm is used to coat a camera lens. What are the three longest wavelengths that are intensified in the reflected light? (Enter your answers from smallest to largest.) 2. Relevant equations λn = λ/n n = index of refrection for constructive interference: 2t = (m + 1/2)λn 2nt = (m + 1/2)λ destructive interference: 2nt = mλ 3. The attempt at a solution Honestly have no idea what the question is asking... not sure how to combine them, not sure how to find 3 biggest wavelengths not sure if it is constructive interference or not soo 2nt = (m + 1/2)λ 2(1.38m)(0.000000144m) = (0 + 1/2)λ (2)(1.38m)(0.000000144m) / (1/2) = λ λ = 795 nano meters (for m = 0) ^^ Yet says it is wrong All I can think of is to change m to 1, 2, 3 etc but don't think it works. Suggestions??