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Waves and Sounds

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Interference From Two Sources: Waves in a Pond

WAVES-KIBJQ9

VERN HART. Created for Albert.io. Copyright 2016. All rights reserved.

Two ducks, separated by a distance of 10 m, are bobbing up and down on the surface of a pond. The ducks' motion is in phase as they complete 4 full cycles every 5 seconds. Assume the speed of the waves on the water is 4 m/s. A goose approaches the first duck along a straight line, perpendicular to the line joining the two ducks (see figure).

At which location would the goose experience maximum amplitude?

A

2 m from the first duck

B

5 m from the first duck

C

7.5 m from the first duck

D

10 m from the first duck