For water waves and sound waves the unit hertz is usually good enough but radio and TV waves have such a high frequency that the kilohertz (\(kHz\)) or even the megahertz (\(MHz\)) are better units.

Every photon is characterized by wavelength (the distance from the crest of one wave to the crest of the next wave), by frequency (the ... measured in Hertz, which stands for cycles per second ...

This relationship is shown by the equation \(f= \frac {1}{T}\) Frequency is measured in Hertz, Hz. Period is measured using the 'timebase' (seconds per division) from the oscilloscope controls.

Installing seismometers would make it possible to observe changes in the moon's shape and position caused by the passing of deci-Hertz GWs. This frequency range fills the gap of GW spectrum ...