What is the top part of a wave called?

The top part of a wave is known as the crest. This is the point at which the wave reaches its maximum height or peak displacement from its equilibrium position. Understanding the terms used to describe wave structures is crucial for grasping more complex concepts in wave mechanics and physics.

The crest is significant because it represents the highest point a wave reaches above the rest position, which is essential in measuring other characteristics of the wave, such as amplitude. Amplitude refers to the maximum displacement from the rest position, which is effectively the height of the crest above the equilibrium line.

On the other hand, the trough, which is the opposite of the crest, refers to the lowest point of the wave. Wavelength describes the distance between two successive crests or troughs in a wave, and is important in understanding the spatial characteristics of wave propagation. Each of these terms contributes to a comprehensive understanding of wave behavior, but the crest specifically denotes the wave's peak point.