radio

Radio is a technology that is used for signal transmission and modulation by electromagnetic radiation (electromagnetic waves). These waves propagate across and through the air and can also travel through space vacuum, because these waves do not require the carrier medium (such as air molecules). The radio waves are a form of electromagnetic radiation, and is formed when electrically charged objects is modulated (increased frequency ) at a frequency that is found in radio frequency (RF) in an electromagnetic spectrum, and electromagnetic radiation move by electric and magnetic oscillations.