- Types:
- show 21 types...
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actinic radiation, actinic ray
electromagnetic radiation that can produce photochemical reactions
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beam, electron beam, ray
a group of nearly parallel lines of electromagnetic radiation
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black-body radiation, blackbody radiation
the electromagnetic radiation that would be radiated from an ideal black body; the distribution of energy in the radiated spectrum of a black body depends only on temperature and is determined by Planck's radiation law
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Hertzian wave
an electromagnetic wave generated by oscillations in an electric circuit
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gamma radiation, gamma ray
electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength
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line
a single frequency (or very narrow band) of radiation in a spectrum
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microwave
a short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens and for transmitting telephone, facsimile, video and data
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radio emission, radio radiation, radio wave
an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m
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X ray, X-radiation, X-ray, roentgen ray
electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
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cathode ray
a beam of electrons emitted by the cathode of an electrical discharge tube
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infrared, infrared emission, infrared light, infrared radiation
electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
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light, visible light, visible radiation
(physics) electromagnetic radiation that can produce a visual sensation
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particle beam
a collimated flow of particles (atoms or electrons or molecules)
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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
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ground wave
a radio wave propagated on or near the earth's surface
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radio signal
a radio wave used to transmit and receive messages
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carrier, carrier wave
a radio wave that can be modulated in order to transmit a signal
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short wave
a radio wave with a wavelength less than 100 meters (a frequency greater than 3 megahertz)
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medium wave
a radio wave with a wavelength between 100 and 1000 meters (a frequency between 300 kilohertz and 3000 kilohertz)
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long wave
a radio wave with a wavelength longer than a kilometer (a frequency below 300 kilohertz)
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UV, ultraviolet, ultraviolet illumination, ultraviolet light, ultraviolet radiation
radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays