photoelectric work functionphotoelectromagnetic effectphotoelectronphotoemissionphotoemissivephotoemitterphotoemitter cathodephotoflash unitphotogeneratorphotogoniometerphotographic transmission density optical densityphotohermoelectric effectphotoionization atomic photoelectric effectphotolithographyphotoluminescencephotomagnetic effectphotomagnetoelectric effectphotomaskphotometerphotometryphotomixerphotomultiplierphotomultiplier counterphotomultiplier tube multiplier phototube electron multiplier phototubephotonphoton couplingphoton emission spectrumphoton energyphoton fluxphotonegativephotonephelometerphotonic sublayerphotopositivephotorelayphotoresistphotoresist layerphotoresistancephotoresistorphotosensitive recordingphotospherephototimerphototransistorphototube photoelectric tubephotovoltaicphotovoltaic offectphsae detector phase discriminator phase to voltage converterphthalocyanice q switchingphtoconductionphysicalphysical layer
