Electromagnetic radiation with a wavelength much larger than that of visible light. We encounter radio waves in our daily lives for example in communication devices such as radios and cell phones. Type of radiation: Radio Waves
are low energy electromagnetic radiation, like light waves and gamma rays. These waves pass through empty space and are often used on Earth to communicate over large distances. Radio waves are also detected from objects in space like stars, galaxies and quasars.
(see also electromagnetic spectrum) A kind of electromagnetic radiation, like light, but far beyond the red or even the infrared portion of the spectrum. When a solar flare or coronal mass ejection erupts, hot, charged particles are accelerated away from the Sun. When this happens, a radio signal is emitted that reaches Earth in a little over 8 minutes.
Radio waves are a type of electromagnetic wave occurring in the radio frequency portion of the electromagnetic spectrum. A common use by humans is to transport information through the atmosphere or outer space without wires. Radio waves are distinguished from other kinds of electromagnetic waves by their wavelength, a relatively long wavelength in the electromagnetic spectrum.