光ひかり電でん離りMeanings1nounphotoionizationTechnical term in physics and chemistry for the ionization of an atom or molecule by absorption of a photon.光ひかり電でん離りは、紫し外がい線せんやX線せんによって引ひき起おこされることが多おおい。Photoionization is often caused by ultraviolet or X-ray radiation.
