It is not possible for a photoelectric interaction to occur between a 50-keV x-ray photon and an atom with inner-shell electrons that have a binding energy of 60 keV or more.

Question

Quizplus · Accepted Answer

For a photoelectric interaction to occur, the incoming photon must have an energy greater than or equal to the binding energy of the electron it aims to eject. A 50-keV photon cannot eject an electron with a 60-keV binding energy.

It Is Not Possible for a Photoelectric Interaction to Occur