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spectral luminous efficiency

noun

a measure of the efficiency of radiation of a given wavelength in producing a visual sensation. It is equal to the ratio of the radiant flux at a standard wavelength to that at the given wavelength when the standard wavelength is chosen so that the maximum value of this ratio is unitySymbol: V ( λ ) ((for photopic vision)), V′ ( λ ) ((for scotopic vision))

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Nearby words

  1. spectra,
  2. spectra yellow,
  3. spectral,
  4. spectral class,
  5. spectral line,
  6. spectral series,
  7. spectral type,
  8. spectrally,
  9. spectre,
  10. spectrin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012