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An incident X-ray with wavelength 1.5400 Å undergoes Compton scattering at an angle of 28° relative to its direction of

Posted: Fri May 06, 2022 7:49 am
by answerhappygod
An incident X-ray with wavelength 1.5400 Å undergoes Compton
scattering at an angle of 28° relative to its direction of motion.
(i) Determine the wavelength of the scattered X-ray (ii) What is
the momentum of the electron? (iii) Find the wavelength of the
electron.
Asked this question before, but the answer given for part (iii)
isn't making sense to me. Please help.