Question

Give the relation between velocity wavelength and frequency

Answer 1

v= n×wavelength is required relation

Answer 2

The relationship between the three quantities, velocity, wavelength and frequency can be given as ,

Velocity = Wavelength * Frequency

This can be easily derived by basic knowledge of lengths and wave motion characteristics.
For the travelling energy in the wave,

x = v t
Now,
Phase = 2π/Wavelength * Path difference (x)
Also,
Phase = 2π/Time period * Path difference (x)
Simplifying these two equations, we can come to the relationship v = n*Wavelength