单词 | mechanical equivalent of light |
释义 | mechanical equivalent of light [mi`kan·ǝ·kǝl i`kwiv·ǝ·lǝnt ǝv `līt] OPTICS The ratio of the radiant power emitted by a monochromatic light source whose wavelength is that at which the sensitivity of phototopic vision is greatest (about 555 nanometers), to its luminous flux measured in lumens. |
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