Conceptual Physics (12th Edition)

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

Chapter 29 - Think and Explain: 47



Work Step by Step

For light waves to interfere with each other, they must be coherent. Generally, interference occurs when light from a single source is divided (e.g., going through 2 slits, passing through 2 slits) and then recombined. Light from 2 stars won't produce an interference pattern because the waves of light from the sources are incoherent, i.e., they have no phase relationship between them.
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