Light

light

1 noun, adjective, -er, -est, verb, light·ed or lit, light·ing.

2. Physics .
a. Also called luminous energy, radiant energy. electromagnetic radiation to which the organs of sight react, ranging in wavelength from about 400 to 700 nm and propagated at a speed of 186,282 mi./sec (299,972     km/sec), considered variously as a wave, corpuscular, or quantum phenomenon.

15. Art .
a. the effect of light falling on an object or scene as represented in a picture.
b. one of the brightest parts of a picture.

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