Question

look at the image below. which letter represents the wavelength of the wave?
a
b
c
d

Explanation:

Wavelength is defined as the distance between two corresponding points on adjacent waves, such as from one crest to the next crest. In the diagram, label A marks the distance between the crest of one wave and the crest of the adjacent wave, which matches the definition of wavelength. Labels C and D represent wave amplitude (distance from the rest position to a crest/trough), and B is only a single crest endpoint, not a distance between corresponding wave points.

Answer:

A. A