Essential University Physics: Volume 1 (3rd Edition)

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

Chapter 14 - Section 14.3 - Waves on a String - Example - Page 249: 14.3


1.4 meters

Work Step by Step

We set the two equations for the intensity of light equal to each other in order to find the distance at which the two lights have the same intensity: $r_{4.9} = r_{9.2}\sqrt{\frac{P_{4.9}}{P_{9.2}}} =1.9\sqrt{\frac{4.9}{9.2}} = 1.4 \ m$
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