An X-ray photon of wavelength 6 pm (1 pm = 10^-12 m) makes a head-on collision with an electron, so that the scattered photon goes in a direction opposite to that of the incident photon. The electron is initially at rest.
(a) How much longer is the wavelength of the scattered photon than that of the incident photon?
This is a Compton scattering problem where a X-ray incident photon makes a head-on collision with an electron. The change of wavelength of the scattered photon is calculated. Also, the kinetic energy of the recoiling electron is solved based on the conservation of energy.