I am using a computational electromagnetics software that solves for the resultant electric and magnetic fields around materials represented as lattices of discrete dipoles. Some of the results are the extinction, absorption, and scattering efficiency factors of EM waves, represented as a graph across a sweep of different wavelengths. According to the documentation: Absorption efficiency factor = absorption cross section / (pi*(characteristic dimension)^2) Scattering efficiency factor = scattering cross section / (pi*(characteristic dimension)^2) Extinction efficiency factor = absorption efficiency factor + scattering efficiency factor The characteristic dimension represents the radius of a sphere with equal volume to the object being calculated. When I plot out some of these graphs from different geometry I input, I get distinct peaks at certain wavelengths. If one of these peaks happens in the absorption graph, what does this mean? Does it mean that a lot more light is absorbed at that wavelength than what would be expected at the geometry's size? I have a sense for what extinction means, however. It is just the amount of light that is not transmitted. Is this right?