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View synonyms for luminance
luminance
[ loo-muh-nuhns ]
noun
- the state or quality of being luminous.
- Also called luminosity. the quality or condition of radiating or reflecting light:
the blinding luminance of the sun.
- Optics. the quantitative measure of brightness of a light source or an illuminated surface, equal to luminous flux per unit solid angle emitted per unit projected area of the source or surface.
luminance
/ ˈluːmɪnəns /
noun
- a state or quality of radiating or reflecting light
- a measure (in candelas per square metre) of the brightness of a point on a surface that is radiating or reflecting light. It is the luminous intensity in a given direction of a small element of surface area divided by the orthogonal projection of this area onto a plane at right angles to the direction L
luminance
/ lo̅o̅′mə-nəns /
- The luminous intensity of a light source per unit area. Occasionally the lambert unit is used to measure luminance.
- Also called photometric brightness
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Word History and Origins
Origin of luminance1
1875–80; < Latin lūmin- (stem of lūmen ) light + -ance
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Word History and Origins
Origin of luminance1
C19: from Latin lūmen light
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Example Sentences
A few fluoros cast wan puddles of luminance on the plastic flooring.
From Project Gutenberg
Still the whole machine is clear-cut to the smallest wire in their all-exposing luminance.
From Project Gutenberg
The remainder of the big room receded into a grey twilight encircling the patch of luminance.
From Project Gutenberg
A luminance seemed to come from above, from the unseen heights of the magnificent double staircase.
From Project Gutenberg
The silhouette disappeared, and, shortly afterwards, the gray luminance.
From Project Gutenberg
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