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Question: If the rest mass of electron or positron is 0.51 MeV, then the kinetic energy of each particle in th...

If the rest mass of electron or positron is 0.51 MeV, then the kinetic energy of each particle in the electron-positron pair production by a g-photon of 2.42 MeV will be –

A

0.3 MeV

B

1.9 MeV

C

0.7 MeV

D

1.5 MeV

Answer

0.7 MeV

Explanation

Solution

K = = 2.42−1.022\frac { 2.42 - 1.02 } { 2 } = 0.7 MeV