Conceptual Physics (12th Edition)

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

Chapter 29 - Think and Explain: 31


For an opening/object of a given size, diffraction is more pronounced for longer wavelengths.

Work Step by Step

This is discussed on page 548, and illustrated in Figure 29.11. The wavelengths of AM/FM radio waves are thousands of times longer than those of visible light waves. AM radio waves (wavelengths of 100+ meters) diffract easily around buildings. FM radio waves diffract with difficulty (their higher-than-AM-radio-frequency means their wavelengths are shorter). Light waves, with wavelengths of roughly 0.00004-0.00007 cm, hardly diffract around buildings at all.
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.