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If the resulting amplitude is smaller, then it's "destructive interference".

If the resulting amplitude is larger, then it's "constructive interference".

Looks like the name you give it depends on which wave you're more interested in.

When a large wave and a small wave interfere, the resulting amplitude can be

larger than either one, smaller than either one, or midway between them.

If the resulting amplitude is midway between the individual amplitudes, and you

were using the larger one to communicate with, then from your point of view, the

interference is destructive. If you were more interested in the smaller one, then

as far as you're concerned the same interference is constructive.

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14y ago

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