1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Compton effect: Scattering angle of electron

  1. Apr 17, 2016 #1
    1. The problem statement, all variables and given/known data
    A 0.7MeV (E°) photon scatters off a free electron such that the scattering angle of the photon is twice the scattering angle of the electron (θ=2φ). Determine the scattering angle for the electron.

    2. Relevant equations
    λ' - λ° = h/(mec)(1-cosθ)
    E = hc/λ

    ρelectron = mev / √(1-v2/c2)

    3. The attempt at a solution
    The initial wavelength of the photon (λ°) = hc/E° = 5.92x10-13m

    Honestly, I'm not sure at all where to go from here. I know it's a conservation of momentum problem, but based on the equation above, I need the velocity of the electron in order to find it's momentum.
  2. jcsd
  3. Apr 17, 2016 #2
    why do you need to find momentum?
    Last edited: Apr 17, 2016
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted