Learn the relationship between velocity and wavelength and the relationship between amplitude and frequency by clicking on the links below. Wavelength lambda and frequency f are connected by the speed c of the medium. The frequency f of a wave is the number of times a waves crests pass a point in a secondIf you watch a water wave in the bath pass over one of your toes twice every second the frequency of the wave is 2 Hz.
Lnc where l is the wavelength n is the frequency and c is the speed of light.
The relationship between these two measures of intensity has been determined by experiment. We denote frequency by f or n and calculate it in the units of Hertz or Hz. Electromagnetic waves traveling through vacuum have a speed of 310 8 m s -1. The relationship between the speed of sound wavelength and frequency is the same for all waves.