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Compton Effect

  1. Sep 5, 2009 #1
    Hi,

    I have a question regarding the Electron scattering angel Teta in formula in:
    http://www.whfreeman.com/MODPHYSICS/PDF/3-2bw.pdf [Broken]
    which indicates Compton wavelength shift by:

    labda2 - lamda1 = (h/mc)(1 - cos(Teta)). (3.40)

    With Teta = 0 we get labda2 = lamda1 (no change of energy by the UV photon!)

    Which means, if Photon and Electron are on the same path, there is NO interaction!

    If Teta = pi (Photon and Electron moving in the opposite direction) we get the MAX change of photon energy

    Can someone please give me an physical interpretation of this?

    Thanks
    David
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Sep 5, 2009 #2
    Sorry, I found my mistake,
    I didn't know how to delete the question!

    Thanks

    David
     
  4. Sep 5, 2009 #3
    You are absolutely right. If there is no deflection of the photon (theta = 0), then there is no energy loss. Here is another site:
    http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/compeq.html#c1
    If theta = 180 degrees, there is maximum energy transfer to the electron.
     
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