Conceptual Physics (12th Edition)

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

Chapter 31 - Think and Discuss: 69

Answer

Protons moving at the same speed as electrons have more momentum. The electrons have the longer wavelength.

Work Step by Step

Momentum is p = mv, so the larger-mass proton has more momentum. The de Broglie wavelength is h/p, so the electron, with smaller momentum p, has the longer wavelength.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.