Radio Earlier Times

Radio is a kind of communication that uses electromagnetic waves, or radio signals, to deliver an electronic notice from one place to another without using wiring. Conductor unit called the transmitter (transmitter), when the unit is switched to the sound of a radio signal that can be heard is called the recipient (receiver). Typically, the recipient is referred to as a "radio" or a radio box. Function radio to broadcast (or deliver) music, news, lectures or other forms of radio sehala called stesen radio. Guglielmo Marconi of Italy was held as the creator of the radio.

Radio line of people, amatur radio and also use the radio telephone bimbit. Polis, Bomba and others who assist in a rainy day is also used radio to communicate. In search and rescue efforts in the jungle or at sea, the radio signal anxiety is very important to find prey.