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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 the 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 particles at any point changes simple harmonically with frequency equal to one half of the the difference between component waves.

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The correct Answer is:
D
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