Let "m" represent the mass of an electron, and "c" represent the speed of light. In order to create an electron- positron pair, we must start with a photon whose energy is A) at least mc². B) at least 2mc². C) at least 4mc². D) any value greater than zero. E) Actually it is impossible to create such pairs from photons.

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Quizplus · Accepted Answer

To create an electron-positron pair, the photon must have enough energy to account for the rest mass energy of both the electron and the positron, which is 2mc².

Let "M" Represent the Mass of an Electron, and "C