Which of the following represents the wavelength of a wave?
diagram of a wave. the point between the highest and lowest points is labeled a; the height is labeled b; the highest point is labeled c; the distance between the highest points of consecutive waves is labeled d.
a
b
c
d

D. the distance between the highest points of consecutive waves

Explanation:

The wavelength of a wave is defined as the distance traveled by a periodic perturbation that propagates through a medium in a given time interval. It is usually represented by and can be calculated if the frequency of the wave is known, since there is an inverse relationship between both.

In the specific case of a periodic sine wave (which is the way in which a wave is usually represented graphically) the wavelength can be determined as the distance between two consecutive maxima of the disturbance.

Therefore, the correct option is D.

the answer is a)

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no. dot product   =0 when vecs at right angles