Answer
$7.25\times10^3 K$.
Work Step by Step
Use Wien’s displacement law, equation 39.21.
$$T =\frac{2.90\times10^{-3}m \cdot K}{\lambda_m}$$
$$T =\frac{2.90\times10^{-3}m \cdot K}{400\times10^{-9}m }=7.25\times10^{3}K$$
University Physics with Modern Physics (14th Edition)
by Young, Hugh D.; Freedman, Roger A.
Published by
Pearson
ISBN 10:
0321973615
ISBN 13:
978-0-32197-361-0
Chapter 39 - Particles Behaving as Waves - Problems - Exercises - Page 1315: 39.40
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