

MCQOPTIONS
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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 | |