Spectral radiant energy
per time interval (spectral radiant power, Pλ) absorbed by a system per volume, V. SI unit is W m-4; common unit is W cm-3 nm-1.
Mathematical expression: Pλ0[1 - 10^(-A(λ))]/V, where Aλ is the @A00028@ at @W06659@ λ and superscript 0 (zero) indicates incident @R05046@.
PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 297 (https://doi.org/10.1351/pac200779030293)