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