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In a photon-electron collision by Compton effect, the photon diffused has an energy of 120 KeV...

In a photon-electron collision by Compton effect, the photon diffused has an
energy of 120 KeV as the electron recedes with a kinetic energy of 40
Kev.
a) Find the wavelength of the photon incident.
b) Find the scattering angle of the photon
c) Find the scattering angle of the electron.

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