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Beats are produced by the superimpositio...

Beats are produced by the superimposition of two waves of nearly equal frequencies. Which of the following statements is CORRECT?

A

all particles of the medium vibrate simple harmonically with frequency equal to the difference between the frequencies of component waves

B

the frequency of beats changes with the location of the observer

C

the frequency of beats changes with time

D

amplitude of vibration of particle at any point changes simple harmonically with frequency equal to one half of the difference between the component waves

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The correct Answer is:
D
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