Conceptual Physics (12th Edition)

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

Chapter 36 - Think and Explain: 53

Answer

In a flat universe, beams of light that start out parallel will remain parallel, and never return to their starting point.

Work Step by Step

This is discussed on page 695.
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