蘭利langley,縮寫為Ly),是測量太陽輻射強度的國際通用計量單位,1947年設立,為紀念美國物理學家塞繆爾·蘭利而得名。

1蘭利=1卡路里/1平方厘米,如果換算為國際單位制中的「焦耳/平方米」,則1蘭利=41840.00焦耳/平方米


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