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What is meant by constructive and destructive interference
When the crests or troughs of two interfering waves meet, their amplitudes add together. This principle is known as constructive interference. So, what happens when the crest of one wave meets the trough of another wave? Well, the opposite happens, and it`s called destructive interference. When the crest and trough of two interfering waves meet, one amplitude subtracts from the other.
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