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Homework Help: Energy Levels

  1. Feb 27, 2007 #1
    1. The problem statement, all variables and given/known data

    The K characteristic X-ray line for tungsten has a wavelength of 1.94 10-11 m. What is the difference in energy between the two energy levels that give rise to this line? Express this in each of the following units.
    (a) joules
    (b) electron volts

    2. Relevant equations


    3. The attempt at a solution

    How do I find the two energy levels?
  2. jcsd
  3. Feb 28, 2007 #2
    You don't need to know the energy levels, you just need to know their difference in energy. You know the x-ray wavelength, and there is an equation that gives you the energy of the x-ray corresponding to this wavelength - what is that equation?
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