Consider the following: I.A photoelectric process in which all emitted electrons have energy less than hf, where f is the frequency of the incident light.
II.A photoelectric process in which some emitted electrons have kinetic energy greater than hf.
III.Compton scattering from stationary electrons for which the emitted light has a frequency that is greater than that of the incident light.
IV.Compton scattering from stationary electrons for which the emitted light has a frequency that is less than that of the incident light.
The only possible processes are:
A)I
B)III
C)I and III
D)I and IV
E)II and IV

Question

Quizplus · Accepted Answer

Process I is a standard photoelectric effect where all emitted electrons have energy less than the energy of the incident photons. Process II is a photoelectric effect where some electrons are emitted with higher energy than the incident photons, which is not possible according to the laws of conservation of energy. Process III is Compton scattering from stationary electrons where the frequency of the emitted photon is greater than that of the incident photon. Finally, process IV is Compton scattering from stationary electrons where the frequency of the emitted photon is less than that of the incident photon, which is possible due to the conservation of momentum and energy. Therefore, only processes I and IV are possible.

Consider the Following: I