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Compton effect: Scattering angle of electron

  • #1

Homework Statement


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.

Homework Equations


λ' - λ° = h/(mec)(1-cosθ)
E = hc/λ

ρelectron = mev / √(1-v2/c2)

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.
 

Answers and Replies

  • #2
why do you need to find momentum?
 
Last edited:

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