Answer
213 s
Work Step by Step
In the previous section, we found that the frequency $\nu=4.7\times10^{-3}\,Hz$.
Time period T is the inverse of frequency.
Therefore, $T=\frac{1}{4.7\times10^{-3}\,Hz}=213\,s$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 33 - Electromagnetic Waves - Problems - Page 1001: 2b
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