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fluorescence

more about fluorescence

fluorescence


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Fluorescence  \Flu`o*res"cence\,  n. 
  A  property  possessed  by  fluor  spar,  uranium  glass,  sulphide 
  of  calcium,  and  many  other  substances,  of  glowing  without 
  appreciable  rise  of  temperature  when  exposed  to  light  or  to 
  ultra-violet  rays,  cathode  rays,  X  rays,  etc 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Fluorescence  \Flu`o*res"cence\,  n.  [From  {Fluor}.]  (Opt.) 
  That  property  which  some  transparent  bodies  have  of  producing 
  at  their  surface,  or  within  their  substance,  light  different 
  in  color  from  the  mass  of  the  material,  as  when  green 
  crystals  of  fluor  spar  afford  blue  reflections.  It  is  due  not 
  to  the  difference  in  the  color  of  a  distinct  surface  layer, 
  but  to  the  power  which  the  substance  has  of  modifying  the 
  light  incident  upon  it  The  light  emitted  by  fluorescent 
  substances  is  in  general  of  lower  refrangibility  than  the 
  incident  light.  --Stockes. 
 
  From  WordNet  r  1.6  [wn]: 
 
  fluorescence 
  n  :  light  emitted  during  absorption  of  radiation  of  some  other 
  (invisible)  wavelength 




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