1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?