Chemistry Dictionary & Glossary: Terms Starting with Ph PHPHASEPHASE DIAGRAMPHASE VELOCITYPHENOLPHONONPHOSPHORESCENCEPHOTOCHEMICAL OXIDANTSPHOTOCHEMICAL SMOGPHOTOCONDUCTIVE DETECTORPHOTOELASTIC EFFECTPHOTOELECTRIC EFFECTPHOTOELECTRON SPECTROSCOPY (PES)PHOTOMULTIPLIER TUBE (PMT)PHOTOMULTIPLIER TUBES (PMTS)PHOTONPHOTOSENSITIZED REACTIONPHOTOVOLTAIC DETECTORPHYSICAL CHANGEPHYSICAL VAPOR DEPOSITION (PVD)