A gamma-ray photon of energy 1.00 MeV scatters off an electron at an angle perpendicular to its original direction.Calculate the kinetic energy of the recoiling electron.
A)489 keV
B)511 keV
C)663 keV
D)253 keV
E)337 keV

Question

Quizplus · Accepted Answer

The Compton scattering formula is used to calculate the change in wavelength of the photon, and from there, the energy transferred to the electron. For a 90-degree scattering angle, the energy of the recoiling electron is approximately 663 keV.

A Gamma-Ray Photon of Energy 1