The numerator has dimensions of energy, so dividing by gives an angular frequency.

The angular frequency has units of radians per second.

Here is the wavelength and is the angular frequency of the wave.

The transfer function in terms of the angular frequencies becomes:

Here a constant angular frequency, chosen in accordance with the characteristics of the wave field under study.

It can be shown that the resonant angular frequency is given by:

The radian per second is also the unit of angular frequency.

The angular frequency can be calculated with the following formula:

The wavenumber is related to the angular frequency by:.

This spin is manipulated by control of the angular frequency.