Langley (unit)

The Langley ( unit symbol : lan or ly ), also known as pyron (from Greek: pyros ), is an Anglo-American unit of irradiation named after the American astrophysicist Samuel Pierpont Langley . For example, it can be used to indicate the amount of solar energy hitting the surface of the earth at one location on a given day.

1 lan = 1 ly = 1 cal _th / cm² = 41 840 Joule / m ²

1 lan = approx. 11.622 Wh / m².

Individual evidence

^ François Cardarelli: Scientific Unit Conversion. A Practical Guide to Metrication , Springer Verlag, London, 1999, p. 300.
^ A. Thompson, BN Taylor: Appendix B9. Conversion Factors. In: NIST Guide to the SI . The National Institute of Standards and Technology , October 5, 2010, accessed April 16, 2013 .
^ Solar Energy at Race Rocks

[1] François Cardarelli: Scientific Unit Conversion. A Practical Guide to Metrication , Springer Verlag, London, 1999, p. 300.

[NIST-2] A. Thompson, BN Taylor: Appendix B9. Conversion Factors. In: NIST Guide to the SI . The National Institute of Standards and Technology , October 5, 2010, accessed April 16, 2013 .

[3] Solar Energy at Race Rocks