ultraviolet ray exposure The condition of being subjected to electromagnetic radiation, that is, energy emitted and absorbed by charged particles, which exhibits wave-like behavior as it travels and has both electric and magnetic field components, in the part of the electromagnetic spectrum with wavelengths between about 10 and 400 nm. Ultraviolet radiation can be ionizing or non-ionizing depending on the wavelength. UV radiation exposure XCO:0000042 experimental_condition_ontology electromagnetic radiation exposure