The federal agency responsible for regulating communications in the USA.קרא עוד >
Terms beginning with F
An atom or molecule containing unpaired electrons.Free radicals are active and unstable.קרא עוד >
The number of waves per time unit, usually one second. The unit of measurement is the Hertz (Hz).קרא עוד >
Continuous bands or groups of selected isolated frequencies in the electromagnetic spectrum.קרא עוד >