Efficiencies are dimensionless magnitudes: they compare the absorption, extinction or scattering cross section to the geometrical cross section of the particle. Because of this, if the particle absorbs, extinguishes or scatters more than would be expected for its geometrical size, its absorption, extinction or scattering efficiency will be greater than 1.
Efficiencies are dimensionless magnitudes: they compare the absorption, extinction or scattering cross section to the geometrical cross section of the particle. Because of this, if the particle absorbs, extinguishes or scatters more than would be expected for its geometrical size, its absorption, extinction or scattering efficiency will be greater than 1.
Normal absorption measurements by different spectrophotometers measures its value using transmission data. A= ln(1/transmittance). In very high absorption cases, this value can be as high as 6 (depending on the limitation of transmittance accuracy).
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