lu·mi·nance (l  m -nns)n. 1. The condition or quality of being luminous. 2. Physics The intensity of light per unit area of its source. |
luminance [ˈluːmɪnəns]
n
1. a state or quality of radiating or reflecting light
2. (Physics / General Physics) 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. Symbol L
[from Latin lūmen light]
| luminance (lm-nns) The luminous intensity of a light source per unit area. Occasionally the lambert unit is used to measure luminance. Also called photometric brightness. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  luminance - the quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun"physical property - any property used to characterize matter and energy and their interactions illuminance, illumination - the luminous flux incident on a unit area incandescence - light from heat glow, luminescence - light from nonthermal sources |
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