In the Compton effect, a 0.133 nm photon strikes a free electron in a headon collision and knocks it into the forward direction. The rebounding photon recoils directly backward.
Use conservation of (relativistic) energy and momentum to determine the kinetic energy of the electron.
Use the equation p=E/c=hf/c=h/λ.


K = 

eV 
Determine the wavelength of the recoiling photon.


λ′ = 

nm 
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