Crest and trough are terms commonly used to describe specific points in a wave, particularly in the context of physics, engineering, and various fields of wave dynamics. 1. **Crest**: The crest is the highest point of a wave. In a sinusoidal wave, it represents the maximum displacement of the wave from its rest position (equilibrium). In visual terms, if you picture a wave, the crest is the top of the wave's peak.
