Radio Signal

Radio waves are a type of electromagnetic radiation with the longest wavelengths in the electromagnetic spectrum, typically with frequencies of 300 gigahertz and below. At 300 GHz, the corresponding wavelength is 1 mm; at 30 Hz the corresponding wavelength is 10,000 kilometers. Like all electromagnetic waves, radio waves in a vacuum travel at the speed of light, and in the Earth's atmosphere at a close, but slightly lower speed. Radio waves are generated by charged particles undergoing acceleration, such as time-varying electric currents. Naturally occurring radio waves are emitted by lightning and astronomical objects, and are part of the blackbody radiation emitted by all warm objects. Radio waves are generated artificially by an electronic device called a transmitter, which is connected to an antenna which radiates the waves. They are received by another antenna connected to a radio receiver, which processes the received signal.

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Researchers from Montreal and India detect radio signal from galaxy 8.8 billion light years away

Radio signal from 9 billion light-years away from Earth captured

Radio signal from 9 billion light-years away from Earth captured

Radio signal detected from galaxy 8 billion light years away; breaks previous records

Astronomers capture radio signal from ancient galaxy at record-breaking distance

Uncovering Secrets of the Early Universe: Astronomers Capture Radio Signal From Distant Galaxy

Astronomers Detect Radio Signal from Strongly Gravitationally Lensed Galaxy

A mysterious radio signal has been detected from a distant galaxy, MIT says

MIT researchers detect unusual radio signal from far-off galaxy

Scientists have detected a "strange and persistent" radio signal that sounds like a heartbeat in a distant galaxy

Canadian telescope detects longest radio signal of its kind from deep space: astronomers

Scientists found a heartbeat-like radio signal coming from a distant galaxy

A Bizarre Radio Signal From Deep Space Has Been Detected Beating Like a Heart

Sorry, But Chinese Scientists Didn’t Actually Find an Alien Radio Signal

Radio signal coming from another galaxy detected by scientists

A mysterious radio signal was discovered 60 million lightyears from Earth

Photonic technology enables real-time calculation of radio signal correlation

The Radio Signal From Proxima Centauri Came From Earth After All