The energy of an incoming photon must be greater than the binding energy of a metal's electron in order to have that electron ejected from the metal's surface .

Name: The energy of an incoming photon must be greater than the binding energy of a metal's electron in order to have that electron ejected from the metal's surface .
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In the photoelectric effect, a photon must have energy greater than the work function (binding energy) of the metal to eject an electron.

The Energy of an Incoming Photon Must Be Greater Than