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  • 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- positron pair is 0.78 MeV, then the energy of the gamma

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- positron pair is 0.78 MeV, then the energy of the gamma ray photon must be

Option: 1

0.78 MeV


Option: 2

1.78 MeV


Option: 3

1.28 MeV


Option: 4

0.28 MeV


Answers (1)

best_answer

\mathrm{\text { Energy of } \gamma \text {-ray photon }=0.5+0.5+0.78=1.78 \, \mathrm{MeV}}.

Posted by

Pankaj Sanodiya

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