Intensity of any wave is proportional to which of the following?

Q. Intensity of any wave is proportional to which of the following?
Answer: Square of amplitude
Notes: 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.

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