Langley (unit)
From Wikipedia, the free encyclopedia
- The correct title of this article is langley (unit). The initial letter is shown capitalized due to technical restrictions.
 |
Please help improve this article or section by expanding it. Further information might be found on the talk page or at requests for expansion. This article has been tagged since January 2007. |
The langley (Ly) is an international unit used to measure solar radiation (or insolation). The unit was named after Samuel Pierpont Langley (1834-1906) in 1947.
[edit] Definition
One langley is exactly 1 thermochemical calorie per square centimetre. In SI units, 1 langley is exactly 41840.00 J/m² (or joules per square metre).
