has participant causally downstream of or within surface layer radiation energy transfer process irradiation 2018-11-03T20:29:00Z An energy transfer process during which a material entity receives energy through radiation. The term irradiation usually - but not always - excludes the exposure to non-ionizing radiation, such as infrared, visible light, microwaves from cellular phones or electromagnetic waves emitted by radio and TV receivers and power supplies. Please use the subclasses of this term for precision.