We use the volume integral equation formulation of frequency-domain electromagnetic scattering to settle the issue of additivity of the extinction, scattering, and absorption cross sections of a fixed tenuous group of particles. We show that all the integral optical cross sections of the group can be obtained by summing up the corresponding individual-particle cross sections, provided that the single-scattering approximation applies.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7780502 | PMC |
| http://dx.doi.org/10.1364/OL.44.000419 | DOI Listing |
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