Relation between frequency (n), time (T) and wavelength (λ)

Time period (T) of a wave is defined as the time taken to produce one complete wave; and frequency (n) of a wave is defined as the number of complete waves produced in unit time Thus, they are related as

n=
 1 T
o
r
T
=
 1 n

In one time period (T), a wave advances by a distance equal to one wavelength. Thus, if 'V' is the velocity of the given wave, it is given by,

v=
 λ T
.Asn
=
 1 T
We may write v = nλ

Thus, velocity of wave propagation = frequency × wavelength.

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