University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 39 - Particles Behaving as Waves - Problems - Exercises - Page 1315: 39.39

Answer

1.06 mm. Microwave.

Work Step by Step

Use Wien’s displacement law, equation 39.21. $$\lambda_m =\frac{2.90\times10^{-3}m \cdot K}{T}$$ $$\lambda_m =\frac{2.90\times10^{-3}m \cdot K}{2.728K}=1.06\times10^{-3}m$$ This wavelength is in the microwave portion of the electromagnetic spectrum.
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