Frequency is the rate at which events recur or vibrate. Frequency is measured in cycles per second or events per second. The inverse of frequency is wavelength. All objects, liquids, solids and spiritual energies vibrate or spin with one or more frequencies.
Light vibrates at very high frequencies and so is described in terms of wavelength.
We supply a wide variety of frequency generators, ranging form the simplest zappers to laboratory generators with digital display of frequency.