Radio spectrum
Radio waves are frequencies between 3 Hz and about 300 GHz between the electromagnetic waves, but also for radio frequency radio waves, or radio frequency, radio. The radio technology converts sound signals or other signals through radio waves. RF technology is also used in nuclear magnetic resonance and magnetic imaging; RF coil is one of its research topics. The source of radio waves may also be natural, such as radio astronomy is the study of radio waves from outer space of a science. ...