Physics Today · 1979 · 589 citations · 0 references
Natural SciencesChemistryMaterials ScienceOptical MaterialsOpticsSpectroscopyAbsorption SpectroscopyInfrared SpectroscopyOptical Properties Of MaterialsOptical Properties Of SolidsOptical SpectroscopyUltraviolet-visible SpectroscopyOptical Absorption SpectraOptical Emission SpectraRare-earth Compounds