1.

A photon of energy 4.1 MeV is incident on a lead nucleus, causing the creation of electron-positron pair. They travel perpendicular to the initial direction of the photon. The energy of the electron is ____________

A. 4.1 MeV
B. 2.05 MeV
C. 1.02 MeV
D. 0.51 MeV
Answer» C. 1.02 MeV


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