#radiation  the physical phenomenon of radiating energy in the form of waves or particles
  supertype:  #physical_phenomenon  a natural phenomenon involving the physics of matter and energy
  subtype:  #ionizing_radiation  high-energy radiation capable of producing ionization in substances through which it passes
     subtype:  #alpha_radiation__alpha_ray__alpharay  the radiation of alpha particles during radioactive decay
     subtype:  #beta_radiation__beta_ray__electron_radiation  radiation of beta particles during radioactive decay
     subtype:  #cosmic_ray  highly penetrating ionizing radiation of extraterrestrial origin; consisting chiefly of protons and alpha particles; collision with atmospheric particles results in rays and particles of many kinds
     subtype:  #neutron_radiation__neutronradiation  radiation of neutrons (as by a neutron bomb)
     subtype:  #X_ray__X-radiation__roentgen_ray  electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
  subtype:  #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
     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
  subtype:  #corpuscular_radiation__corpuscularradiation__particulate_radiation__particulateradiation  a stream of atomic or subatomic particles that may be charged positively (e.g. alpha particles) or negatively (e.g. beta particles) or not at all (e.g. neutrons)
     subtype:  #alpha_radiation__alpha_ray__alpharay  the radiation of alpha particles during radioactive decay
     subtype:  #beta_radiation__beta_ray__electron_radiation  radiation of beta particles during radioactive decay
     subtype:  #neutron_radiation__neutronradiation  radiation of neutrons (as by a neutron bomb)
  subtype:  #radioactivity__activity  radiation resulting from radioactive decay
  subtype:  #solar_radiation__solarradiation  radiation from the sun
     subtype:  #solar_flare__solarflare__flare  a sudden eruption of intense high-energy radiation from the sun's surface; associated with sunspots and radio interference
     subtype:  #solar_prominence__solarprominence  large eruptions of luminous hydrogen gas that rise thousands of kilometers above the chromosphere
     subtype:  #solar_wind__solarwind  a stream of protons moving radially from the sun
  subtype:  #radiation.action  the act of radiating
     subtype:  #bombardment  the act (or an instance) of subjecting a body or substance to the impact of high-energy particles (as electrons or alpha rays)


1 schema is about #radiation
[pm#graph1_on_radiation
     [any #radiation,
          may have for pm#radiation_measure: several #radioactivity_unit]
];

No  statement uses a specialization of #radiation; click here to add a statement.


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