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))

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