#### Answer

Choice B.

#### Work Step by Step

The de Broglie wavelength is inversely proportional to the particle’s momentum, $\lambda = \frac{h}{p}$.
If the particle’s momentum were doubled, the wavelength would be halved.

Published by
Pearson

ISBN 10:
0-32162-592-7

ISBN 13:
978-0-32162-592-2

Choice B.

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