Which part of a progressive wave is referred to as the highest point?

The highest point of a progressive wave is known as the crest. This terminology is standard in wave dynamics, where waves are typically characterized by two main features: the crest and the trough.

The crest represents the peak of the wave, which is the point where the energy is highest and the water level reaches its maximum height above the still water level. In contrast, the trough is the lowest point of the wave. Understanding the concept of the crest is essential in various applications, including assessing wave height and energy, which are crucial in fields such as oceanography and marine navigation.

Wavebase refers to the depth in the water where wave energy diminishes and doesn't affect the water below, while amplitude measures the height of the wave from the still water level to the crest, indicating the intensity of the wave rather than its position in relation to the maximum height.