Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 40 - All About Atoms - Problems - Page 1251: 66b

Answer

The given stimulated emission was in the radio region of the electromagnetic spectrum.

Work Step by Step

The frequency $1666\;MHz$ belong to the radio region region of the electromagnetic spectrum. Therefore, the given stimulated emission was in the radio region of the electromagnetic spectrum.
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