infrared reflection absorption spectroscopyhttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31317336enGetty Institute2026-03-30 20:25:27http://AATesaurus.cultura.gencat.cat/aat/getty_enTesaurus d'Art i Arquitecturatext/html IRRAS RAIRS reflection absorption infrared spectroscopy spectroscopy, infrared reflection absorption