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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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