| 单词 | luminance |
| 释义 | Word Frequency luminance(ˈluːmɪnəns) noun 1. a state or quality of radiating or reflecting light 2. 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 Word origin C19: from Latin lūmen light |
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