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# High Energy Photon in, Lower Out

SATPHY-9AJTXN

A high energy photon collides elastically with a charged particle (usually an electron). The photon "bounces away" with less energy (a longer wavelength).

The process described here is called what?

A

Compton scattering

B

the photoelectric effect

C

x-ray production

D

annihilation

E

quantum tunneling