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Homework Help: Photon electrons

  1. Apr 11, 2005 #1
    If 15eV photon interacts with a Hydrogen atom at groundstate [-13.6eV], and all 15eV is transfered to the atom. How would the KE of the ejected electron be found? and what is the de Broglie wavelength of the electron?

    For the Kinetic Energy, i said 15eV = KE + 13.6eV, KE = 1.4eV

    for the wavelength, i have no clue. any help?
  2. jcsd
  3. Apr 11, 2005 #2
    The de Broglie wavelength is found by dividing Planck's constant by the momentum of the moving object. You can find the momentum using the kinetic energy.
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