Radio is a technology that allows pegiriman signal by modulating electromagnetic waves. These waves pass (spread) through the air and the vacuum space, because these waves do not require a transport medium. Radio waves are a form of electromagnetic radiation and is formed when the object is accelerated by the electric charge contained in the frequency Radio frequency (RF) in the electromagnetic spectrum. These waves vary in the range of 10 hertz up to several giga hertz. Radiation lektromagnetik moved by electric and magnetic oscillations. When radio waves through the cable, the oscillation of electric and magnetic fields can affect the alternating current and voltage in the cable. Radio waves can be transformed into audio or other signals that can create information.
TELEVISION
Television is a broadcast picture tentacle. Televise word comes from the word tele and vision, who have their own meaning far (tele) and visual (Vision) so that means melihar television from a distance. Equated with the discoverer discoverer televise the wheel, because it can change the world civilization. In Indonesia "Television" sometimes informally referred to tivi, TV, or Tipi.
The discovery of television involve many parties, inventor and innovator, both individually and corporately. Television is a mass work from year to year. Inventor of television would not be separated from the inventor's legal basis of electromagnetic wave that was invented by Joseph Henry and Michael Faraday (1831) who started the era of electronic communication.
