Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Photon-Electron Collision

  1. Sep 30, 2004 #1

    AKG

    User Avatar
    Science Advisor
    Homework Helper

    If I'm given an energy for an electron, and a wavelength for a photon, how can I determine the maximum energy loss for the electron?
     
  2. jcsd
  3. Oct 31, 2004 #2

    Andrew Mason

    User Avatar
    Science Advisor
    Homework Helper

    I am not sure of your question. Are you talking about an electron/photon collision where the electron is not strongly bound to an atom?

    Free electron/photon collisions follow the Compton formula:

    [tex]\triangle \lambda = \frac{h}{m_ec} (1 - cos\theta) [/tex]

    where [itex]\theta[/itex] is the angle of the electron's velocity after the collision compared to the direction of the original photon.

    The electron gains energy in the collision.

    AM
     
    Last edited: Oct 31, 2004
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook