Radio

Updated: 05/05/2017 by Computer Hope

Radio may refer to any of the following:

1. Used since the early 1900s, radio communications allow communication at a distance using the radiation of electromagnetic waves that travel through the vacuum of space, or the atmosphere. It is a method of wirelessly transmitting information such as sound or binary data, and is a method used in Wi-Fi to wirelessly network computers.

Today, radio is used in such technologies as cellular telephones, global positioning systems (GPS), satellite radio, broadcast television, microwave ovens, some remote controls, and radar.

Radio communication history

In the early 1860s, James Clark Maxwell first predicted the existence of radio waves that was later proved to be true when Heinrich Hertz successfully demonstrated electromagnetic waves in 1886. In 1895, Guglielmo Marconi became the first person to receive a radio signal. By October 1902, he was able to telegraph the letter "S" across the English Channel, which became the first successful transatlantic radiotelegraph message.

2. RadioWhen referring to a device, a radio is an early device that allowed people to listen to music using the wireless radio communications mentioned above. In the picture to the right is an example of a radio stereo that could play AM and FM radio and had the option to play a cassette tape.

Who invented the radio?

Like the computer and other significant inventions the Radio has many different inventors because it takes more than one technology to work like the device we know today.

Most of the credit to the invention of the radio music player we know today goes to Guglielmo Marconi and Nikola Tesla who both fought over patent rights to the radio communications used with a radiotelegraph. However, without the tube diode and vacuum tubes inventions by John Fleming the radio would also not be what it is today.

In 1906 Reginald Fessenden made the first AM radio broadcast.

Edwin ArmstrongĀ invented the FM radio in 1933.

On September 25, 2001, XM radio (a satellite radio service) became available.

Is the radio still used today?

Yes. Millions of people listen to the radio every day in their car, on their smartphones, and over the Internet.

Electronics terms, Network, Radiation, Remote control, Wireless