What Is The Relationship Between Velocity, Wavelenght And Frequency?

Wavelength= velocity x time period       as distance is equal to the product of time and velocity
Velocity=wavelength / time period
Velocity= wavelength x 1/time period
Velocity=wavelength x frequency   as reciprocal of time period is equal to the frequency
V=d f     where v is velocity, d is wavelength and f is frequency.hyperphysics.phy-astr.gsu.edu