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luminescencemore about luminescence

luminescence


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Luminescence  \Lu`mi*nes"cence\,  n.  [See  {Luminescent}.] 
  1.  (Physics)  Any  emission  of  light  not  ascribable  directly  to 
  incandescence,  and  therefore  occurring  at  low 
  temperatures,  as  in  phosphorescence  and  fluorescence  or 
  other  luminous  radiation  resulting  from  vital  processes, 
  chemical  action  friction,  solution,  or  the  influence  of 
  light  or  of  ultraviolet  or  cathode  rays,  etc 
 
  2.  (Zo["o]l.) 
  a  The  faculty  or  power  of  voluntarily  producing  light, 
  as  in  the  firefly  and  glowworm. 
  b  The  light  thus  produced;  luminosity;  phosphorescence. 
 
  From  WordNet  r  1.6  [wn]: 
 
  luminescence 
  n  1:  light  not  due  to  incandescence;  occurs  at  low  temperatures 
  2:  light  from  nonthermal  sources  [syn:  {glow}] 




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