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RADIO WAVE
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I. (noun)
Sense 1
Meaning:
An electromagnetic wave with a wavelength between 0.5 cm to 30,000 m
Synonyms:
radio emission; radio radiation; radio wave
Classified under:
Nouns denoting natural phenomena
Hypernyms ("radio wave" is a kind of...):
electromagnetic radiation; electromagnetic wave; nonparticulate radiation (radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge)
Hyponyms (each of the following is a kind of "radio wave"):
Hertzian wave (a former name for a radio wave; an electromagnetic wave of radio frequency generated by oscillations in an electric circuit)
sky wave (a radio wave that is reflected back to earth by the ionosphere or a communications satellite; permits transmission around the curve of the earth's surface)
ground wave (a radio wave propagated on or near the earth's surface)
radio signal (a radio wave used to transmit and receive messages)
carrier; carrier wave (a radio wave that can be modulated in order to transmit a signal)
short wave (a radio wave with a wavelength less than 100 meters (a frequency greater than 3 megahertz))
medium wave (a radio wave with a wavelength between 100 and 1000 meters (a frequency between 300 kilohertz and 3000 kilohertz))
long wave (a radio wave with a wavelength longer than a kilometer (a frequency below 300 kilohertz))
Holonyms ("radio wave" is a part of...):
radio-frequency spectrum; radio spectrum (the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television)
Context examples:
Magnetic resonance imaging (MRI) uses a large magnet and radio waves to look at organs and structures inside your body.
(MRI Scans, NIH)
Pulsars are dense remnants of dead stars that regularly emit beams of radio waves, which is why some call them "cosmic lighthouses."
(Listening for Gravitational Waves Using Pulsars, NASA)
Phenomena across the Universe emit radiation spanning the entire electromagnetic spectrum — from high-energy gamma rays, which stream out from the most energetic events in the cosmos, to lower-energy microwaves and radio waves.
(Hubble's Megamaser Galaxy, ESA/NASA)
The electrons in the ionosphere normally reflect radio waves back to ground level, enabling long-distance radio communications.
(Solar Storms Can Drain Electrical Charge Above Earth, NASA)
A telephone number that is used by a mobile communication system that uses a combination of radio wave transmission and conventional telephone switching to permit telephone communication to and from mobile users within a specified area.
(Mobile Telephone Number, Food and Drug Administration)
The researchers analyzed radio occultations — made when Voyager 2 sent radio waves through the rings to be detected back on Earth — and stellar occultations, made when the spacecraft measured the light of background stars shining through the rings, which helps reveal how much material they contain.
(Uranus May Have Two Undiscovered Moons, NASA)
No matter what planet you're on, lightning bolts act like radio transmitters — sending out radio waves when they flash across a sky, said Shannon Brown of NASA's Jet Propulsion Laboratory in Pasadena, California, a scientist from NASA's Juno mission.
(Juno Solves 39-Year Old Mystery of Jupiter Lightning, NASA)
As part of the VLA nascent disk and multiplicity survey (VANDAM for short), the researchers mapped the radio waves leaking out of a dense cocoon of dust about 600 light-years away that contained a whole nursery of young stars.
(Our Sun Could Have Been Born With an Evil Twin Called "Nemesis", The Titi Tudorancea Bulletin)
While not visible in optical images, the lobe can also be seen in radio waves.
(The Giant Galaxy Around the Giant Black Hole, NASA)
Such dips occur at wavelengths between 65 megahertz (MHz) and 95 MHz, overlapping with some of the most widely used frequencies on the FM radio dial, as well as booming radio waves emanating naturally from the Milky Way galaxy.
(Astronomers detect ancient signal from first stars in universe, National Science Foundation)
