radio waves


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Related to radio waves: microwaves, electromagnetic spectrum
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Radio Waves

radio waves

Traveling electromagnetic disturbances whose frequencies lie in the radio region of the electromagnetic spectrum, extending from about 20 kilohertz to over 300 gigahertz, the highest frequencies corresponding to millimeter and submillimeter wavelengths. Radio astronomy may in principle be carried out at any radio frequency but in practice observations are confined to certain ‘radio-astronomy bands' set aside for that purpose by international agreement to minimize interference from other services (see table). These bands lie within the radio window (see atmospheric windows).
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
References in periodicals archive ?
The NAOJ and other astronomical organizations called on companies to use materials that do not reflect as much sunlight and to adjust the types of radio waves they use, among other actions.
It is precisely the fact that not only radio waves are broadcast, but information is transmitted through them, is the basis of the claim that Popov is the discoverer of the radio.
Radio waves are generated artificially by transmitters and received by radio receivers, using antennas.
In fairness, Public Health England has every reason to feel confident - the effects of exposure to radio waves, also used by mobile phones, wi-fi networks, microwaves and television transmitters, have been thoroughly researched.
Clearly there's a causal connection between this small region producing X-rays, and this big region producing radio waves."
Newmark Grubb Knight Frank (NGKF) has been selected by Chestnut Holdings as the exclusive office leasing agent for the Radio Wave building at 49 West 27th Street.
To address these issues, a two-stage method generating a virtual radio wave environment on a PC was developed.
Its Wi-Fi systems use directed beamforming technology, which delivers more efficient coverage and capacity and reduces the amount of radio waves in the coverage area.
On His turn, Aldrick.C Chairman of the Conference gave a speech in which he talked about the importance of holding this conference, as well as the importance of radio transmission via short waves and coordination among countries to ensure that radio waves are free from any undesired interference.
Over the past few years, astronomers have observed a new phenomenon, a brief burst of radio waves, lasting only a few milliseconds.
Neutron stars were particularly interesting objects to study, as some of them - called pulsars - gave off pulsed radio waves whose beams swept across telescopes at regular intervals, Daily Mail reported.
In [1] a twenty-four hours monitoring duration of the radio waves deep fading and attenuation variation was conducted.