Compton Scattering: .1 MeV Photon & Recoil Energies

[phyguy321]

Homework Statement

A photon of initial energy .1 MeV undergoes Compton scattering at an angle of 60degrees.
Find:
The energy of the scattered photon
The recoil energy of the electron
the recoil angle of the electron

Homework Equations

\Delta\lambda= (h/mc)(1-cos\theta)

The Attempt at a Solution

 

[Dick]

I don't think that formula will help you very much except for the energy of the scattered photon. You really need to use relativistic conservation of energy and momentum for the whole event.