Conceptual Physics (12th Edition)

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

Chapter 33 - Think and Explain: 51

Answer

Gamma radiation predominates.

Work Step by Step

The walls of the elevator will block alpha and beta radiation (even your clothing and skin are enough to shield you against most of that radiation). Gamma-ray photons are quite penetrating. This is discussed in the check point on page 618.
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