# Question

A photon with an energy of 5.0 keV is scattered by a free electron.

(a) The recoiling electron could have an energy of (1) zero, (2) less than 5.0 keV, but not zero, (3) 5.0 keV. Why?

(b) If the wavelength of the scattered photon is 0.25 nm, what is the recoiling electron’s kinetic energy?

(a) The recoiling electron could have an energy of (1) zero, (2) less than 5.0 keV, but not zero, (3) 5.0 keV. Why?

(b) If the wavelength of the scattered photon is 0.25 nm, what is the recoiling electron’s kinetic energy?

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