Answer
$K=0.31rad/cm$
Work Step by Step
We can find wave number $K$ as;
$K=\frac{2\pi}{\lambda}$
We plug in the known value of $\lambda$ to obtain $K$:
$K=\frac{2(3.1416)}{20}=0.31$ rad/cm.
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 16 - Waves-I - Problems - Page 472: 11c
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