Subcategories - Physics, Physicists
- Optical Disks Revolutionize Computer Data Storage
- Optical Pulses Shorter than One Trillionth of a Second Are Produced
- Otto Hahn
- Otto von Guericke
- Pauli Formulates Exclusion Principle
- Pauli Formulates the Exclusion Principle
- Pauling Develops His Theory of the Chemical Bond
- Penzias and Wilson Discover Cosmic Microwave Background Radiation
- Percy Williams Bridgman
- Petrus Peregrinus de Maricourt
- Pierre Curie and Marie Curie
- Pierre-Simon Laplace
- Planck Announces His Quantum Theory
- The Principles of Shortwave Radio Communication Are Discovered
- Pyotr Leonidovich Kapitsa
- Quarks Are Postulated by Gell-Mann and Zweig
- Researchers Announce Development of Atom Laser
- Researchers Generate Nuclear Energy on Tabletop
- Robert Andrews Millikan
- Robert Boyle
- Rohrer and Binnig Invent the Scanning Tunneling Microscope
- Röntgen Wins the Nobel Prize for the Discovery of X Rays
- Rubbia and Van Der Meer Discover Three New Particles
- Rubbia and van der Meer Isolate the Intermediate Vector Bosons
- Rutherford Discovers the Proton
- Samuel Pierpont Langley
- Schrödinger Proposes Wave-Mechanical Theory of Atom
- Schwarzschild Develops a Solution to the Equations of General Relativity
- Scientists Produce Most Proton-Rich Nucleus
- Scientists Slow Speed of Light
- Seaborg and McMillan Make Element 94, Plutonium
- Shock Waves Are Used to Pulverize Kidney Stones
- Sir Isaac Newton
- Sir Lawrence Bragg
- Sir William Robert Grove
- Sir William Rowan Hamilton
- Slagle Invents First Expert System, SAINT
- Sony Develops the Pocket-Sized Transistor Radio
- Spencer Discovers Principle of Microwave Cooking
- The Steady-State Theory of the Universe Is Advanced by Bondi, Gold, and Hoyle
- Stephen Hawking
- The Superconducting Supercollider Begins Construction in Texas
- Svante August Arrhenius
- Teisserenc de Bort Discovers the Stratosphere and the Troposphere
- Teller and Ulam Develop the First H-Bomb
- The Tevatron Particle Accelerator Begins Operation at Fermilab
- Thomson Confirms Existence of Isotopes
- Thomson Confirms the Possibility of Isotopes
- Thomson Wins the Nobel Prize for the Discovery of the Electron
- Top Quark Is Tracked at Fermilab
