Conceptual Physics (12th Edition)

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

Chapter 35 - Think and Explain: 53

Answer

There is no contradiction.

Work Step by Step

Einstein's second postulate is that the speed of light in vacuum (free space), c, is the same for all observers. The average speed of light in glass and other transparent mediums is less than c because of absorption and re-emission (page 492), but the speed of individual photons in the space "between" atoms is still c.
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