## Wikipedia - Ley de Lambert Lambert law

https://doi.org/10.1351/goldbook.L03445
The fraction of light absorbed by a system is independent of the incident @R05046@ ($$P_{\lambda }^{0}$$). This law holds only if $$P_{\lambda }^{0}$$ is small, @S05487@ is negligible, and multiphoton processes, @E02257@ populations, and photochemical reactions are negligible.
See:
absorbance
,
Beer–Lambert law
Source:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2251 [Terms] [Paper]