actinic ray

Definitions of actinic ray
  1. noun
    electromagnetic radiation that can produce photochemical reactions
    synonyms: actinic radiation
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    infrared, infrared emission, infrared light, infrared radiation
    electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
    light, visible light, visible radiation
    (physics) electromagnetic radiation that can produce a visual sensation
    UV, ultraviolet, ultraviolet illumination, ultraviolet light, ultraviolet radiation
    radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays
    beam, beam of light, irradiation, light beam, ray, ray of light, shaft, shaft of light
    a column of light (as from a beacon)
    candle flame, candlelight
    the light provided by a burning candle
    one or more circles of light seen around a luminous object
    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
    light during the daytime
    the light of a fire (especially in a fireplace)
    light emitted during absorption of radiation of some other (invisible) wavelength
    friar's lantern, ignis fatuus, jack-o'-lantern, will-o'-the-wisp
    a pale light sometimes seen at night over marshy ground
    light yielded by the combustion of illuminating gas
    glow, glowing, radiance
    the amount of electromagnetic radiation leaving or arriving at a point on a surface
    a steady even light without flames
    a greyish light (as at dawn or dusk or in dim interiors)
    glow, incandescence
    the phenomenon of light emission by a body as its temperature is raised
    light from a lamp
    luminescence, phosphorescence
    light not due to incandescence; occurs at low temperatures
    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
    Moon, moonlight, moonshine
    the light of the Moon
    the light of the stars
    sun, sunlight, sunshine
    the rays of the sun
    (physics) a flash of light that is produced in a phosphor when it absorbs a photon or ionizing particle
    light that streams
    light from a torch or torches
    the diffused light from the sky when the sun is below the horizon but its rays are refracted by the atmosphere of the earth
    sun-ray, sunray
    a ray of artificial ultraviolet light from a sunray lamp
    type 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
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