Langley (unit)

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<ref>Template:Cite encyclopedia</ref> and named after Samuel Langley (1834–1906) in 1947.

Definition

One langley is

• 1 thermochemical calorie per square centimetre,<ref name=nistguide>{{#invoke:citation/CS1|citation

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• 41 840 J/m² (joules per square metre)<ref>{{#invoke:citation/CS1|citation

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See also

• Solar constant
• Radiant exposure

References

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