Point C identifies the trough of the wave. The highest point of the wave is the crest, while the lowest point is the trough.
What is wavelength?
The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point known as the crest, while the trough is the lowest.
The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.
Hence, point C identifies the trough of the wave.
To learn more about the wavelength refer to the link;
https://brainly.com/question/13533093
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