Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 14 - Exercises and Problems - Page 263: 45


The galaxy is receding at $2.38\times10^4 \ km/s$.

Work Step by Step

We use the equation for the velocity when the Doppler Effect is occurring to obtain: $ v = 3\times 10^8 \times (1- \frac{656}{708})=2.38\times10^4 \ km/s$ Given the frequencies, we see that the galaxy is receding at $2.38\times10^4 \ km/s$.
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