College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 13 - Vibrations and Waves - Learning Path Questions and Exercises - Multiple Choice Questions - Page 483: 12

Answer

(b) $2A$

Work Step by Step

When two waves interfere in phase, the amplitude of net wave is the sum of amplitudes of the individual waves. In the case, in which the interfering waves have same amplitude (A) and the wavelength (lambda), the amplitude of net wave is 2A.
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