The letter in the image, that represents the wavelength or the distance traveled by the wave is letter d.
What is wavelength?
The wavelength of a wave is the distance traveled by the wave. This distance can be from one crest to another or from crest of a wave to the trough of a wave.
When the distance is between two successive crest or trough, it becomes one wavelength.
From the given image, the letter that represents the wavelength of the wave is letter d.
Learn more about wavelength here: https://brainly.com/question/10728818
