College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 28 - Quantum Mechanics and Atomic Physics - Learning Path Questions and Exercises - Conceptual Questions - Page 962: 13

Answer

Linear momentum needs to be conserved so the particles will be moving afterward because the initial photon has momentum. Therefore, the electron—positron pair must have some kinetic energy. The input energy is converted into not only their rest energy but also their kinetic energy.

Work Step by Step

Linear momentum needs to be conserved so the particles will be moving afterward because the initial photon has momentum. Therefore, the electron—positron pair must have some kinetic energy. The input energy is converted into not only their rest energy but also their kinetic energy.
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