Langley (unit)

From HandWiki
Unit systemNon-SI metric unit
Unit ofHeat flux
Named afterSamuel Langley
Derivation1 calth/cm2
1 Ly in ...... is equal to ...
   SI units   41 840 J/m2

The langley (Ly) is a unit of heat transmission, especially used to express the rate of solar radiation (or insolation) received by the earth. The unit was proposed by Franz Linke in 1942[1] and named after Samuel Langley (1834–1906) in 1947.


One langley is

See also


  1. Gyllenbok, Jan (2018). "langley". Encyclopaedia of Historical Metrology, Weights, and Measures, Volume 1. Birkhäuser. p. 139. ISBN 9783319575988. 
  2. "Appendix B9. Conversion Factors.". NIST Guide to the SI. The National Institute of Standards and Technology. 2010-10-05. Retrieved 2013-04-14. 
  3. "Solar Energy at Race Rocks".