Source: wikibot/absorption-cross-section
= Absorption cross section
{wiki=Absorption_cross_section}
The absorption cross section is a measure of the likelihood of a particle (such as a photon) being absorbed by a target, which can be an atom, molecule, or any medium. It quantifies the effective area that a particular absorber presents to incoming radiation, correlating the physical properties of the absorber with its ability to absorb electromagnetic radiation.