| 单词 | luminance |
| 释义 | luminance(photometric brightness) Symbol L. The luminous intensity of any surface in a given direction per unit projected area of the surface, viewed from that direction. It is given by the equation L = dI/(dAcosθ) , where I is the luminous intensity and θ is the angle between the line of sight and the normal to the surface area A being considered. It is measured in candela per square metre |
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