Conceptual Physics (12th Edition)

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

Chapter 36 - Review Check Questions (Comprehension): 3

Answer

The equivalence is between accelerating reference frames, and reference frames in a gravitational field.

Work Step by Step

It is impossible to tell them apart from internal measurements. Einstein's principle of equivalence says that all observations, both mechanical and electromagnetic, made inside a accelerating box are exactly the same as those made inside a classical gravitational field. This is discussed on pages 687-689.
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