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luminous intensity

noun, Optics.
the luminous flux in lumens emitted per unit solid angle by a light source, measured in candles. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for luminous intensity
Historical Examples
  • But the luminous intensity of the candle was taken only in the horizontal direction.

    Artificial Light M. Luckiesh
  • The luminous intensity of the oxyhydrogen lime-light as used in practice was generally from 200 to 400 candle-power.

    Artificial Light M. Luckiesh
  • Their luminous intensity and illuminating value became units just as the foot was arbitrarily adopted as a unit of length.

    Artificial Light M. Luckiesh
  • Rumford and also Fresnel devised multiple-wick burners, thus increasing the luminous intensity.

    Artificial Light M. Luckiesh
  • The luminous intensity of a light-source or of the beam of light is directly responsible for the range.

    Artificial Light M. Luckiesh
  • The luminous intensity of the early beacon-fires and oil-lamps was equivalent to a few candles.

    Artificial Light M. Luckiesh
  • For example, consider a small source of light possessing a luminous intensity of one candle in all directions.

    Artificial Light M. Luckiesh
  • The luminous intensity of the streams is, of course, considerably increased when they are focused upon a small surface.

  • The sky in the East was soft with that luminous intensity, as of a melted sapphire, that comes just before the dawn.

British Dictionary definitions for luminous intensity

luminous intensity

a measure of the amount of light that a point source radiates in a given direction. It is expressed by the luminous flux leaving the source in that direction per unit of solid angle Iv
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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luminous intensity in Science
luminous intensity  
The luminous flux per unit solid angle (per steradian), as measured in a given direction relative to a light source. Its unit is the candela. See also luminance.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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