Process in which radiation is transmitted by a scattering sample and leaves the sample in directions other than that required by Snell’s law of refraction. The process is complicated and involves transmission, reflection, and scattering.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 655 (https://doi.org/10.1515/pac-2019-0203)