(1) A form of radiant energy that can neither be seen nor felt. (2) An electromagnetic wave that is generated by a transmitter.

Form of electromagnetic radiation with wavelengths ranging from millimetres to hundreds of kilometres.

Low energy electromagnetic radiation, with long wavelengths and low frequencies.

The lowest energy portion of the electromagnetic spectrum, with wavelengths longer than a meter or energies of below one millionth of an eV (below 10-6 eV).

Radiation with wavelengths longer than about 1 meter.

Electromagnetic radiation at radio frequencies (10,000 Hz to 300x109 Hz).

The "radio wave signals" used in MRI are actually a changing magnetic field that is much weaker than the strong magnetic field of the main magnet in the machine.

Very long wavelength electromagnetic radiation.

See Electromagnetic Waves.

Electromagnetic waves in the frequency range of 10kHz to 100 Ghz  propagated in space without artificial guide.

Electromagnetic waves lying in the radio frequency range, propagated in space without artificial guide.

the form of light with the longest wavelength and the least energy.

Invisible waves which are used by boats for communication and navigation.

A form of light with a frequency that is much lower than visual Light.

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

Electromagnetic radiation, or energy emitted in the form of waves or particles.

Low frequency electromagnetic radiation used to transmit information such as television and radio programs. Waves

Electromagnetic waves of relatively low frequency.

radiation whose wavelength is larger than about 30 cm.

a radiation with a wavelength greater than 30 cm, approximately.

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.

The lowest energy (longest wavelength) photons in the electromagnetic spectrum.

(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.

Radiation with the longest wavelengths and smallest frequencies and energies in the electromagnetic spectrum.

Electromagnetic energy with frequencies in the 3000 hertz (3 kHz) to 300 billion Hertz (300 GHz) portion of the electromagnetic spectrum.

That portion of the electromagnetic spectrum having wavelengths longer than about 10 cm.

Radio waves are a form of electromagnetic radiation with long wavelengths and relative low energy.

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.