illumination

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Definition/MeaningWord/Phrase
tendency for a visual object to be perceived as having the same brightness under widely different conditions of illumination brightness constancy
process of adjusting the eyes to low levels of illumination; cones adapt first; rods continue to adapt for up to four hours dark adaptation
absence of light or illumination dark , darkness
microscope with high-intensity illumination dark-field microscope , ultramicroscope
normal vision in daylight; vision with sufficient illumination that the cones are active and hue is perceived daylight vision , photopic vision
rheostat that varies the current through an electric light in order to control the level of illumination dimmer
device that produces a bright light for warning or illumination or identification flare
light that is a source of artificial illumination having a broad beam; used in photography flood , flood lamp , floodlight , photoflood
beam of a car's headlights that provides distant illumination high beam
measure of illumination illumination unit
condition of spiritual awareness; divine illumination illumination , light
cgs unit of illumination equal to the brightness of a perfectly diffusing surface that emits or reflects one lumen per square centimeter L , lambert
artificial source of visible illumination lamp
process of adjusting the eyes to relatively high levels of illumination; the pupil constricts and the cones system is operative light adaptation
any device serving as a source of illumination light , light source
having abundant light or illumination light , lighting
visual effect of illumination on objects or scenes as created in pictures light , lightness
beam of a car's headlights that provides illumination for a short distance low beam
unit of illumination equal to 1 lumen per square meter; 0.0929 foot candle lux , lx
game played under artificial illumination at night night game
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