the illumination of a standard candle at a distance of one metre.
单词 | θ76471 |
释义 | the world > matter > physics > electromagnetic radiation > light > intensity of light, luminosity > [noun] > unit of light intensity > specific measurements (3) candle-metre1908 the illumination of a standard candle at a distance of one metre. lumen-hour1925 the quantity of light corresponding to a flux of one lumen radiated for one hour. lumen-second1930 see lumen-hour n. |
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