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Intensity of any wave is proportional to which of the following?
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- Amplitude
- Square of amplitude
- Square root of amplitude
- Cube of amplitude
- Amplitude
Correct Option: B
The energy of a wave is proportional to the square of its amplitude. Therefore, the intensity of a wave is also proportional to the square of its amplitude. This means that if Intensity drops off at a rate of 1/r2, wave amplitude drops off at a rate of 1/r.