Langley (unit)

Langley (unit)

The langley (Ly) is a unit of energy distribution over area. It is used to measure solar radiation (or insolation). The unit was named after Samuel Pierpont Langley (1834-1906) in 1947.

Definitions

*One langley is one thermochemical calorie per square centimetre.
*In SI units, one langley is 41840.00 J/m² (or joules per square metre).


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  • unit of measurement — noun any division of quantity accepted as a standard of measurement or exchange the dollar is the United States unit of currency a unit of wheat is a bushel change per unit volume • Syn: ↑unit • Derivationally related forms: ↑unitize ( …   Useful english dictionary

  • langley — /lang lee/, n. Physics. for electromagnetic radiation incident upon a surface, a value of energy per unit area equal to one calorie per square centimeter. [1945 50; after S. P. LANGLEY] * * * ▪ British Columbia, Canada       city (“district… …   Universalium

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  • langley — (Ly)    a CGS unit of heat transmission equal to one thermochemical calorie per square centimeter, or exactly 41.84 kilojoules per square meter (kJ/m2). Named for the American astronomer Samuel P. Langley (1834 1906), the langley is used to… …   Dictionary of units of measurement

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