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

[badtwistoffate]

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]

 

[badtwistoffate]

also I know the SI for what langley is used for is cal/cm so would the SI be (cal/cm)/s?

 

[mezarashi]

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.