Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 32 - Elementary Particles - Misconceptual Questions - Page 944: 8

Answer

Choice E.

Work Step by Step

The strong force does result from the exchange of $\pi$ mesons between the neutron and the proton. This is correct on the nuclear scale, as discussed on page 923. Pion exchange explains the strong nuclear force, as choice A says. However, suppose we look at a much smaller scale, and consider the individual quarks that comprise the proton, the neutron, and the $\pi$ meson. As explained on page 937, the transfer of gluons explains the strong force between quarks, as choice D says. Choices A and D are both correct, at different scales, which is what choice E says.
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