mechanical equivalent of light
noun
The ratio of radiant flux to luminous flux, expressed in watts per lumen (= 0.0015 watt per lumen at 555 nm wavelength).
Origin
Early 20th century; earliest use found in Proceedings of the Royal Society of London.
| 单词 | mechanical equivalent of light |
| 释义 | mechanical equivalent of lightnoun The ratio of radiant flux to luminous flux, expressed in watts per lumen (= 0.0015 watt per lumen at 555 nm wavelength). Origin |
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