What is the term for the distance between two crests of a wave?

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Waves can be characterized by highs and lows. The highest point in a wave is known as the crest, while the lowest point is known as the trough. There are few properties of a wave that are used to characterize it. These parameters include wavelength, frequency and amplitude. 

The distance between any two successive crests is known as the wavelength. It is also equal to the distance between any two troughs. In fact, wavelength is equal to the distance between any two corresponding points (such as crests or troughs, etc.) on successive waves. The frequency is the number of completed cycles (crest to crest is one cycle, for example) in a given time period. The amplitude of a wave is the distance between the midline and the crest or trough. 

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