follow Dictionary.com

8 Wintry Words to Defrost Your Vocabulary

spectral luminous efficiency

noun
1.
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 unity ((for photopic vision)) V(λ), ((for scotopic vision)) V′(λ)
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
Cite This Source

Word of the Day

Word Value for spectral

12
15
Scrabble Words With Friends