Griffiths Introduction to Elementary Particles · Problem 3.24

Symmetries — David J. Griffiths

Physics — QFT · compton-scattering

Problem

(Compton scattering.) A photon of wavelength

\lambda

collides elastically with a charged particle of mass

m

. If the photon scatters at angle

\theta

, find its outgoing wavelength,

\lambda'

. [

Answer

\lambda' = \lambda + (h/mc)(1 - \cos\theta)

]