Index of physics articles (O)

The index of physics articles is split into multiple pages due to its size.

To navigate by individual letter use the table of contents below.

O

 * OECC
 * OPAL detector
 * OPERA experiment
 * OSA Fellow
 * OSO 3
 * OSO 7
 * OVRO 40 meter Telescope
 * OZI Rule
 * Oak Ridge National Laboratory
 * Oberth effect
 * Objective (optics)
 * Oblique correction
 * Oblique shock
 * Oblique wing
 * Observable
 * Observable universe
 * Observational cosmology
 * Observer (physics)
 * Observer (special relativity)
 * Observer effect (physics)
 * Ocean gyre
 * Ocean thermal energy conversion
 * Oceanography
 * Ocellus Lucanus
 * Octavio Novaro
 * Odd molecule
 * Odd sympathy
 * Oersted
 * Oersted Medal
 * Ofer Biham
 * Ofer Lahav
 * Off-axis optical system
 * Oganesson
 * Ogden Rood
 * Ohm
 * Ohm's law
 * Ohmic contact
 * Ohnesorge number
 * Oil drop experiment
 * Okorokov effect
 * Ola Hunderi
 * Olaf Dreyer
 * Olami–Feder–Christensen model
 * Olav Holt
 * Olbers' paradox
 * Old quantum theory
 * Oldroyd-B model
 * Ole Jacob Broch
 * Oleg D. Jefimenko
 * Oleg Firsov
 * Oleg Losev
 * Oleg Sushkov
 * Olexander Smakula
 * Olga Kennard
 * Olinto De Pretto
 * Oliver E. Buckley Condensed Matter Prize
 * Oliver Heaviside
 * Oliver Lodge
 * Olli Lounasmaa
 * Olympia Academy
 * Omega baryon
 * Omega meson
 * On-Line Isotope Mass Separator
 * On Physical Lines of Force
 * On shell and off shell
 * On the Shoulders of Giants (book)
 * On the movement of small particles suspended in a stationary liquid demanded by the molecular-kinetic theory of heat
 * One-electron universe
 * One-loop Feynman diagram
 * One-way speed of light
 * Onium
 * Online refuelling
 * Onsager reciprocal relations
 * Onset of deconfinement
 * Oops-Leon
 * Oort constants
 * Opacity (optics)
 * Opalescence
 * Open-pool Australian lightwater reactor
 * OpenFOAM
 * OpenScientist
 * Open Source Physics
 * Open quantum system
 * Open shell
 * Operator (physics)
 * Operator product expansion
 * Oppenheimer–Phillips process
 * Optic crystals
 * Optical Fiber Technology
 * Optical Gravitational Lensing Experiment
 * Optical Physics
 * Optical Review
 * Optical Society
 * Optical Society of Japan
 * Optical aberration
 * Optical amplifier
 * Optical autocorrelation
 * Optical axis
 * Optical black hole
 * Optical brightener
 * Optical cavity
 * Optical chopper
 * Optical circulator
 * Optical coating
 * Optical coherence tomography
 * Optical communication
 * Optical conductivity
 * Optical contact bonding
 * Optical depth
 * Optical downconverter
 * Optical equivalence theorem
 * Optical feedback
 * Optical field
 * Optical flat
 * Optical force
 * Optical format
 * Optical lattice
 * Optical lens design
 * Optical levitation
 * Optical medium
 * Optical metamaterial
 * Optical microsphere
 * Optical modulator
 * Optical modulators using semiconductor nano-structures
 * Optical neural network
 * Optical parametric amplifier
 * Optical parametric oscillator
 * Optical path
 * Optical path length
 * Optical phenomenon
 * Optical phonon
 * Optical physics
 * Optical power
 * Optical properties of carbon nanotubes
 * Optical pulsar
 * Optical pumping
 * Optical reader
 * Optical rectification
 * Optical ring resonators
 * Optical rotatory dispersion
 * Optical scalars
 * Optical science
 * Optical sciences
 * Optical sectioning
 * Optical sine theorem
 * Optical superresolution
 * Optical switch
 * Optical telescope
 * Optical theorem
 * Optical train
 * Optical transition radiation
 * Optical tweezers
 * Optical window
 * Optically stimulated luminescence
 * Opticks
 * Optics
 * Optics & Photonics News
 * Optics (physics)
 * Optics Classification and Indexing Scheme
 * Optics Communications
 * Optics Express
 * Optics Letters
 * Optics and Photonics News
 * Optics and Spectroscopy
 * Optik (journal)
 * Optoelectric nuclear battery
 * Optoelectronics
 * Optofluidics
 * Optomechanics
 * Orb (optics)
 * Orbit
 * Orbit (dynamics)
 * Orbit equation
 * Orbit phasing
 * Orbital angular momentum multiplexing
 * Orbital angular momentum of light
 * Orbital decay
 * Orbital eccentricity
 * Orbital elements
 * Orbital inclination
 * Orbital integral
 * Orbital mechanics
 * Orbital motion
 * Orbital motion (quantum)
 * Orbital node
 * Orbital period
 * Orbital plane (astronomy)
 * Orbital state vectors
 * Orbiting body
 * Orbitrap
 * Ordal Demokan
 * Order and disorder (physics)
 * Order operator
 * Ordered exponential
 * Orders of magnitude (charge)
 * Orders of magnitude (density)
 * Orders of magnitude (energy)
 * Orders of magnitude (entropy)
 * Orders of magnitude (force)
 * Orders of magnitude (length)
 * Orders of magnitude (luminous flux)
 * Orders of magnitude (magnetic field)
 * Orders of magnitude (mass)
 * Orders of magnitude (power)
 * Orders of magnitude (pressure)
 * Orders of magnitude (radiation)
 * Orders of magnitude (resistance)
 * Orders of magnitude (specific energy density)
 * Orders of magnitude (specific heat capacity)
 * Orders of magnitude (temperature)
 * Orders of magnitude (voltage)
 * Orest Khvolson
 * Oreste Piccioni
 * Orfeu Bertolami
 * Organic field-effect transistor
 * Organic nonlinear optical materials
 * Organic photorefractive materials
 * Organic superconductor
 * Orientifold
 * Orifice plate
 * Origin of avian flight
 * Ornstein–Zernike equation
 * Orr–Sommerfeld equation
 * Orso Mario Corbino
 * OrthoCAD Network Research Cell
 * Orthobaric density
 * Orthometric height
 * Orthomode transducer
 * Orthorhombic crystal system
 * Orthovoltage X-rays
 * Osborne Reynolds
 * Oscar Lanford
 * Oscar Sala
 * Oscar W. Greenberg
 * Oscillation
 * Oscillator linewidth
 * Oscillator phase noise
 * Oscillatory universe
 * Oscillon
 * Osculating orbit
 * Oseen's approximation
 * Oseen equations
 * Oskar Heil
 * Oskar Klein
 * Oskar Klein Memorial Lecture
 * Oskar Ritter
 * Osmosis
 * Osoaviakhim-1
 * Ostro
 * Ostwald ripening
 * Ostwald–Freundlich equation
 * Otoacoustic emission
 * Ottaviano-Fabrizio Mossotti
 * Otto Bastiansen
 * Otto Hahn
 * Otto Haxel
 * Otto Klemperer (physicist)
 * Otto Kratky
 * Otto Laporte
 * Otto Laporte Award
 * Otto Lehmann (physicist)
 * Otto Lummer
 * Otto Robert Frisch
 * Otto Scherzer
 * Otto Schmitt
 * Otto Stern
 * Otto Wiener (physicist)
 * Otto cycle
 * Otto von Guericke
 * Otto Øgrim
 * Our Mr. Sun
 * Outdoor–indoor transmission class
 * Outflow channels
 * Outhouse (unit)
 * Outline of applied physics
 * Outline of astronomy
 * Outline of geophysics
 * Outline of physical science
 * Outline of physics
 * Ouzo effect
 * Over/under cable coiling
 * Overflow (software)
 * Overlap matrix
 * Overtone
 * Owen Chamberlain
 * Owen Willans Richardson
 * Oxford Calculators
 * Oxford Electric Bell
 * Oxide thin-film transistor
 * Oxsensis
 * Oxygen-burning process
 * Oxygen permeability
 * Oyo Buturi
 * Øyvind Grøn
 * Ozsváth–Schücking metric