illuminance
n. 照度 [计] 照明度
词形变化
illuminances
复数
illuminances
释义与例句
n.
-
1.
The luminous flux incident on unit area of a surface; commonly measured in lux (lumen/metre²) or otherwise foot-candles. The illuminance of a star upon the earth is frequently measured on a negative logarithmic scale referred to as its apparent magnitude, which see.
可数 不可数 物理