The maximum displacement of a wave from its equilibrium position is called the amplitude.
The maximum displacement of a wave from its equilibrium position is called the amplitude. The amplitude represents the maximum distance the particles of the medium (such as air, water, or a string) are displaced from their resting or equilibrium position when a wave passes through them. To determine the amplitude of a wave, you can measure the distance between the highest point (crest) and the equilibrium position (the middle or baseline) of the wave. In other words, the amplitude measures how "high" or "low" a wave peaks from its average position.
