What is the lowest point of a wave below the resting point called?

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Multiple Choice

What is the lowest point of a wave below the resting point called?

Explanation:
In a wave, the motion oscillates around a resting position. The highest point above that line is called a crest, while the lowest point below it is called a trough. The distance from the resting level to either the crest or the trough is the amplitude. So the lowest point below the resting point is trough. Crest or peak describe the top, and ridge isn’t used for the wave’s vertical extreme.

In a wave, the motion oscillates around a resting position. The highest point above that line is called a crest, while the lowest point below it is called a trough. The distance from the resting level to either the crest or the trough is the amplitude. So the lowest point below the resting point is trough. Crest or peak describe the top, and ridge isn’t used for the wave’s vertical extreme.

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