A gamma ray photon creates an electron-positron pair. If the rest mass energy of an electron is `0.5
Channel: Doubtnut
Date: 2020-01-19

A gamma ray photon creates an electron-positron pair. If the rest mass energy of an electron is `0.5 MeV` and the total `K.E.` of the electron-position pair is `0.78 MeV`, then the energy of the gamma ray photon must be.