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Homework Help: What is the value of n for the level in which the electron originated?

  1. Mar 3, 2008 #1
    An electron in a hydrogen atom relaxes to the n= 4 level, emitting light of 114THz.
     
  2. jcsd
  3. Mar 3, 2008 #2
    should be n=6
    E=hf = (6.63*10^-34)(114*10^12) = 7.56*10^-20J = 0.472eV
    E4= -13.6/4^2
    En = -13.6/n^2
    delta E =En-E4=0.85-13.6/n^2
    deltaE = 0.472
    you will find n=6
     
  4. Mar 3, 2008 #3
    Thank you so much, but i have one question:

    when u did 114*10^12 was that showing the conversion factor from THz to Hz?
     
  5. Mar 3, 2008 #4
    also in the first step, how did u convert from J to eV? And where did delta E come from?
     
  6. Mar 3, 2008 #5
    1THz = 10^12 Hz
    1eV =1.6*10^-19 J
    (7,.56 *10^-20)/(1.6*10^-19) = ? eV
     
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