Which of the following terms describes the highest point of a wave?

The term that describes the highest point of a wave is "crest." In wave terminology, the crest is the point where the wave reaches its maximum displacement from the rest position, representing the peak of the wave. This is important in understanding wave behavior, as the crest can affect various properties of the wave, such as its energy and intensity.

In contrast, the trough refers to the lowest point of the wave, which is directly opposite the crest. Amplitude is the measure of the maximum displacement from the rest position, which encompasses both the crest and trough, indicating the overall height of the wave. Frequency represents how often a wave oscillates in a given time period and is not directly related to the height of the wave itself. Understanding these definitions is crucial in the study of wave mechanics and their applications in various fields, including nondestructive testing.