The amplitude of a wave refers to the maximum amount of displacement of a particle on the medium from its rest position . In a sense, the amplitude is the distance from rest to crest. Similarly, the amplitude can be measured from the rest position to the trough position.
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The amplitude is the distance between the centerline and the peak or trough. x = A sin (ωt + ϕ) or x = A cos (ωt + ϕ) is the formula. 2.
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