Compton scattering experiment

In a Compton scattering experiment, a 5 MeV incident photon is scattered off an unknown particle (not an electron) at an angle of θ=30oθ=30o. If the scattered photon has an energy of 2 MeV, what is the mass (in kg) of the unknown particle? Use h = 6.626×10-34 Js = 6.626×10-34 kg m2/s.

Sample Solution