If the amplitude is increased by a factor of 3, intensity increases by a factor of ...

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Multiple Choice

If the amplitude is increased by a factor of 3, intensity increases by a factor of ...

Explanation:
Intensity scales with the square of the amplitude for a wave, so boosting amplitude by a factor of three makes the intensity become (3)^2 times larger. That’s 9 times the original intensity. The other options would imply linear scaling or other inconsistent relations, which don’t match the squared dependence.

Intensity scales with the square of the amplitude for a wave, so boosting amplitude by a factor of three makes the intensity become (3)^2 times larger. That’s 9 times the original intensity. The other options would imply linear scaling or other inconsistent relations, which don’t match the squared dependence.

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