Crest

Definition

The crest is the highest point of a wave, where the displacement of the medium is at its maximum.

Related terms

Trough:

The trough is the lowest point of a wave, where the displacement of the medium is at its minimum.

Amplitude:

The amplitude is the maximum displacement from equilibrium in a wave.

Wavelength:

The wavelength is the distance between two consecutive crests or troughs in a wave.