'phot'-'plat'
- photocurrent
- photodetector
- photoelectric attenuation coefficient
- photoelectric effect
- photoelectric peak
- photoelectron
- photoelectron spectra
- photoelectron spectroscopy
- photoelectron yields
- photoemission spectroscopy
- photographic emulsion calibration
- photographic intensity measurements
- photographic parameter
- photographic photometry
- photographic transmittance
- photoionization
- photoionization spectroscopy
- photometric end-point
- photometric titration
- photometry
- photomultiplier tube
- photon
- photon activation
- photon emission spectroscopy
- photon emission spectrum
- photon emission yield
- photon flux
- photon flux density
- photon radiation
- photopeak
- physical aging
- physical equilibrium
- physical interference
- physical quantity