Sunday, 14 August 2016

Word of the Week - Phosphorescence


  • the property of being luminous at temperatures below incandescence,as from slow oxidation in the case of phosphorus or after exposure to light or other radiation.
  • a luminous appearance resulting from this.
  • any luminous radiation emitted from a substance after the removal of the exciting agent.
  • a fluorescence that persists after the bombarding radiation producing it has stopped
  • a fluorescence for which the average lifetime of the excited atoms is greater than 10 –8 seconds
  • the light emitted in phosphorescence
  • the emission of light during a chemical reaction, such as bioluminescence, in which insufficient heat is evolved to cause fluorescence 

Definition derived from