1. The problem statement, all variables and given/known data Determine what colors of visible light would be absorbed by electrons in an infinite well, N = 3.1 nm. The effective mass for an electron in GaAs is one-fifteenth of the standard electron mass. 2. Relevant equations En = πh2/[2*N2*me/15]*n2 L = nλ/2 Ψ = √(2/L)sin(nπx/L) 3. The attempt at a solution En = 5.4624*10-27*n2 ...but the units do not look correct, and I don't know how to go about the rest of the problem. I thought it had something to do with eventually finding the wavelength.