https://doi.org/10.1351/goldbook.R05041

Radiant power, P, __emitted__ at all wavelengths by an element of surface containing the source point under consideration divided by the area of the source. SI unit is W m-2.**Notes: **

*Source: *

PAC, 2007,*79*, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 409 (https://doi.org/10.1351/pac200779030293)

- Mathematical definition: M = dP/dS. If the @R05046-2@ P is constant over the surface area considered, M = P/S.
- Equivalent to the integration of the @R05046-3@ leaving a source over the solid @A00346@ and over the whole @W06659@ range. Mathematical definition: M = ∫(λ).Mλ.dλ, where M λ is the @S05825@ at @W06659@ λ.
- Same as spherical radiant @E02264@. Formerly called radiant emittance.

PAC, 2007,