Answer
(b) $2.00\times10^{8}\,m/s$
Work Step by Step
Speed $v=\lambda \nu$ where $\lambda$ is the wavelength and $\nu$ is the frequency.
That is, $v=684\times10^{-9}m\times 2.92\times10^{14}\,s^{-1}$
$=2.00\times10^{8}\,m/s$
Chemistry (4th Edition)
by Burdge, Julia
Published by
McGraw-Hill Publishing Company
ISBN 10:
0078021529
ISBN 13:
978-0-07802-152-7
Chapter 6 - Section 6.1 - The Nature of Light - Checkpoint - Page 237: 6.1.3
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