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Infinite potential well

  1. Oct 29, 2016 #1
    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.
     
  2. jcsd
  3. Oct 29, 2016 #2
    check your calculation and putting up the values you get E(n) = E(0) . n^2
    i think you have to search for the visible range absorption trying from n=1 to n2 value which yields say yellow wavelength photon energy. then if n2 comes out to be whole number one can think of quantum absorption;
     
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