Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 31 - Think and Explain: 53


They would exhibit less diffraction.

Work Step by Step

Protons moving at the same speed as electrons have more momentum, and shorter wavelength. Momentum is p = mv, so the larger-mass proton has more momentum. The de Broglie wavelength is h/p, so the proton, with larger momentum p, has the shorter wavelength. Diffraction is more apparent for long wavelengths (as stated on page 548), so protons would diffract less.
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