-
625.
Photoemission
Subjects
Electron emission
-
626.
Photogrammetry
Subjects
-
627.
Photographic optics
Subjects
Optics
-
628.
Photometry
Subjects
-
629.
Photonics
Subjects
Optics
-
630.
Photons
Subjects
Light
-
631.
Photonuclear reactions
Subjects
PhotonsNuclear reactions
-
632.
Photorefractive materials
Subjects
-
633.
Photovoltaic effect
Subjects
Photoelectricity
-
634.
Physical and theoretical chemistry
Subjects
Chemistry
-
635.
Physical biochemistry
Subjects
BiochemistryPhysical organic chemistry
-
636.
Physical constants
Subjects
Units of measurement
-
637.
Physical laboratories
Subjects
Laboratories
-
638.
Physical measurements
Subjects
-
639.
Physical metallurgy
Subjects
-
640.
Physical optics
Subjects
OpticsWave theory of light
-
641.
Physicists
Subjects
Scientists
-
642.
Physics
Subjects
Science
-
643.
Physics education
Subjects
Teaching
-
644.
Physiological effects of radiation
Subjects
Radiation
-
645.
Physiological optics
Subjects
PhysiologyOptics
-
646.
Pions
Subjects
Mesons (Nuclear physics)
-
647.
Planetariums
Subjects
Astronomical models
-
648.
Planetary theory
Subjects
Celestial mechanics
Last updated dated: 21/02/2026