#electromagnetic_radiation__electromagneticradiation__electromagnetic_wave__electromagneticwave__nonparticulate_radiation radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
supertype: radiation the physical phenomenon of radiating energy in the form of waves or particles
part: photon
subtype: actinic_radiation__actinic_ray__actinicray electromagnetic radiation that can produce photochemical reactions
subtype: infrared_radiation__infrared__infrared_light__infrared_emission electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
subtype: visible_light__visiblelight__light__visible_radiation__visibleradiation (physics) electromagnetic radiation that can produce a visual sensation; "the light was filtered through a soft glass window"
subtype: beam_of_light__beam__light_beam__lightbeam__ray__rayoflight__shaft__shaft_of_light a column of light (as from a beacon)
subtype: heat_ray a ray that produces a thermal effect
subtype: infrared_ray a ray of infrared radiation; produces a thermal effect (as from an infrared lamp)
subtype: high_beam the beam of a car's headlights that provides distant illumination
subtype: moonbeam__moonray a ray of moonlight
subtype: sunbeam__sunray a ray of sunlight
subtype: laser_beam__laserbeam a beam of light generated by a laser
subtype: low_beam__lowbeam the beam of a car's headlights that provides illumination for a short distance
subtype: candlelight__candle_flame the light provided by a burning candle
subtype: corona.visible_light one or more circles of light seen around a luminous object
subtype: counterglow__gegenschein a faint spot of light in the night sky that appears directly opposite the position of the sun; a reflection of sunlight by micrometeoric material in space
subtype: daylight light during the daytime
subtype: firelight the light of a fire (especially in a fireplace)
subtype: fluorescence light emitted during absorption of radiation of some other (invisible) wavelength
subtype: autofluorescence self-induced fluorescence
subtype: phosphorescence a fluorescence that persists after the bombarding radiation has ceased
subtype: friar's_lantern__ignis_fatuus__jack-o'-lantern__will-o'-the-wisp a pale light sometimes seen at night over marshy ground
subtype: gaslight light yielded by the combustion of illuminating gas
subtype: glowing__radiance__glow the amount of electromagnetic radiation leaving or arriving at a point on a surface
subtype: aureole__corona the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse
subtype: half-light a grayish light (as at dawn or dusk or in dim interiors)
subtype: incandescence.visible_light__glow the phenomenon of light emission by a body as its temperature is raised
subtype: lamplight light from a lamp
subtype: luminescence light not due to incandescence; occurs at low temperatures
subtype: bioluminescence luminescence produced by physiological processes (as in the firefly)
subtype: chemiluminescence luminescence resulting from a chemical reaction as the oxidation of luciferin in fireflies
subtype: meteor__shooting_star a streak of light in the sky at night that results when a meteoroid hits the earth's atmosphere and air friction causes the meteoroid to melt or vaporize or explode
subtype: bolide__fireball an especially luminous meteor (sometimes exploding)
subtype: moonlight__moonshine__moon the light of the moon; "moonlight is the smuggler's enemy"; "the moon was bright enough to read by"
subtype: starlight the light of the stars
subtype: sunlight__sunshine__sun the rays of the sun; "the shingles were weathered by the sun and wind"
subtype: streamer light that streams; "streamers of flames"
subtype: torchlight light from a torch or torches
subtype: twilight the diffused light from the sky when the sun is below the horizon but its rays are refracted by the atmosphere of the earth
subtype: ultraviolet_illumination__ultravioletillumination__ultraviolet__ultraviolet_radiation__ultravioletradiation__ultraviolet_light__ultravioletlight__UV radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays
subtype: electron_beam__beam__ray a group of nearly parallel lines of electromagnetic radiation
subtype: cathode_ray__cathoderay a beam of electrons emitted by the cathode of an electrical discharge tube
subtype: particle_beam a collimated flow of particles (atoms or electrons or molecules)
subtype: ion_beam__ionbeam__inoic_beam__inoicbeam a beam of ions moving in the same direction at the same speed
subtype: black-body_radiation__blackbody_radiation__blackbodyradiation 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
subtype: Hertzian_wave an electromagnetic wave generated by oscillations in an electric circuit
subtype: gamma_radiation__gammaradiation__gamma_ray__gammaray electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength
subtype: line.electromagnetic_radiation a single frequency (or very narrow band) of radiation in a spectrum
subtype: microwave a short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens
subtype: radio_wave__radiowave__radio_emission__radioemission__radio_radiation__radioradiation an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m
subtype: sky_wave__skywave 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
subtype: ionospheric_wave__ionosphericwave a sky wave that is reflected by the ionosphere
subtype: ground_wave a radio wave propagated on or near the earth's surface
subtype: radio_signal__radiosignal a radio wave used to transmit and receive messages
subtype: carrier_wave__carrierwave__carrier a radio wave that can be modulated in order to transmit a signal
subtype: short_wave__shortwave a radio wave with a wavelength less than 100 meters
subtype: long_wave a radio wave with a frequency less than 300 kilohertz
subtype: X_ray__X-radiation__roentgen_ray electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
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