Look up: absorptance

1. absorptance
   Absorptance (a) is ratio of the radiant or luminous flux in a given spectral interval absorbed in a medium to that of the incident radiation. Also called absorption factor.
   Found on http://www.ktf-split.hr/periodni/en/abc/
   
   
2. absorptance
   the ratio of the absorbed radiant or luminous flux to the incident flux Category: Electrical engineering and energy • ratio of the radiant energy flow rate absorbed by a surface to the energy flow rate received Category: Mechanical engineering
   Found on http://www.mijnwoordenboek.nl/definition
   
   
3. Absorptance
   The ratio of the radiation absorbed by a surface to the total energy falling on that surface described as a percentage.
   Found on http://www.neo.ne.gov/statshtml/glossary
   
   
4. Absorptance
   The ratio of solar energy absorbed by a surface to the solar energy striking it.
   Found on http://solarexpert.com/Glossary.html
   
   
5. absorptance
   ratio of the absorbed radiant or luminous flux to the incident flux under specified conditions unit: 1
   Found on http://www.electropedia.org/iev/iev.nsf/
   
   
6. absorptance
   The ratio of the luminous or radiant flux absorbed by a body to the flux falling on it. Absorptance is generally represented by the Greek letter a (alpha). By definition, in the case of a blackbody a = 1. Absorptance was formerly known as absorptivity.
   Found on http://www.daviddarling.info/encyclopedi
   
   
7. Absorptance
   The dissipation of light (radiation) within a surface or medium, caused by the conversion of radiant (luminous) energy to a different form of energy, usually heat, by interaction with matter. The absorption is the "missing piece", when comparing the total reflected and transmitted energy with the in...
   Found on http://www.intl-lighttech.com/support/gl