what is crest?what is trough?
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Waves have moving crests (or peaks) and troughs. A crest is the highest point the medium rises to and a trough is the lowest point the medium sinks to. ... Figure 8.2: Crests and troughs in a transverse wave. Crests and troughs. A crest is a point on the wave where the displacement of the medium is at a maximum.
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A crest point on a wave with the maximum value of upward displacement within a cycle. A crest is a point on a surface wave where the displacement of the medium is at a maximum. A trough is the opposite of a crest, so the minimum or lowest point in a cycle.
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