Physics: Biographies
- Paul Adrien Maurice Dirac
- Paul Ehrenfest
- Paul Karl Ludwig Drude
- Paul Langevin
- Pavel Alekseyevich Cherenkov
- Percy Williams Bridgman
- Peter Joseph Wilhelm Debye
- Petrus Peregrinus
- Philipp Eduard Anton Lenard
- Pierre Bouguer
- Pierre Curie
- Pieter Zeeman
- Pyotr Kapitsa
- Richard Phillips Feynman
- Robert Andrews Millikan
- Robert Hooke
- Robert Jemison Van De Graaff
- Robert Williams Wood
- Rudolf Julius Emanuel Clausius
- Sheldon Lee Glashow