Convert Sun's Radiation Flux Density: 1.64 Langleys/Min - Easy Unit Conversion"

AI Thread Summary
The discussion centers on converting a radiation flux density measurement of 1.64 langleys per minute. The user seeks clarification on the SI unit for radiation flux density, noting that langleys are defined in calories per square centimeter. There is confusion regarding whether "SI unit" refers to base units or derived units, with an emphasis on understanding radiant flux density as watts per unit area. The user concludes that watts, a measure of radiant flux, are derived from joules per second, linking back to fundamental SI units. The conversation highlights the need for clarity in unit definitions for accurate scientific communication.
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i have to convert radiation flux density measured from the sun that's 1.64 langleys/min. Easy no?
Well, I can't find what the SI unit for radiation flux density is, and its not on google.

Anyone know just what the units is [NOT the conversion]
 
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also I know the SI for what langley is used for is cal/cm so would the SI be (cal/cm)/s?
 
By SI unit, do they mean the SI base units or just SI units. By definition, radiant flux density would be: Watts per unit area. Area in derived from length which in SI is the meter. Watts is derived from Joules per second, and Joules is derived from Newton meters, with Newtons coming from kilogram meter per second square.
 

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