What is the name given to the highest point of a wave?

The highest point of a wave is referred to as the crest. In wave terminology, the crest is defined as the peak point where the wave reaches its maximum height above the equilibrium position. This is a fundamental concept in understanding wave properties, as the crest plays a crucial role in determining the wave's energy and behavior.

Amplitude, while related, is the distance from the equilibrium position to the crest (or trough), not the crest itself. The trough represents the lowest point of the wave, occurring at equal distance below the equilibrium position. Frequency deals with how many waves pass a given point in a certain timeframe, which is important in wave analysis but does not pertain to the highest point of the wave. Therefore, the correct answer highlights a key aspect of wave structure, which is essential for understanding various physical phenomena associated with waves.