illuminance

名词 n.
中文释义

英文释义

名词 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. countable,uncountable

词形变化

illuminances plural
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