Index of physics articles (R)

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.

R

 * R-factor (crystallography)
 * R-hadron
 * R-parity
 * R-process
 * R-symmetry
 * R. A. Stradling
 * R. Orin Cornett
 * R. S. Krishnan
 * R. Stanley Williams
 * R. Stephen Berry
 * R136a1
 * R1 (nuclear reactor)
 * R4 nuclear reactor
 * RA-1 Enrico Fermi
 * RC time constant
 * RF antenna ion source
 * RHEED-TRAXS
 * RKKY interaction
 * RNS formalism
 * ROI PAC
 * ROOT
 * RRKM theory
 * RT (energy)
 * RX J0806.3+1527
 * R (cross section ratio)
 * RaLa Experiment
 * Rabbit (nuclear engineering)
 * Rabi cycle
 * Rabi frequency
 * Rabi problem
 * Radial distribution function
 * Radial motion
 * Radial polarization
 * Radial velocity
 * Radian per second
 * Radian per second squared
 * Radiance
 * Radiant barrier
 * Radiant energy
 * Radiant flux
 * Radiant intensity
 * Radiation
 * Radiation-dominated era
 * Radiation chemistry
 * Radiation damping
 * Radiation flux
 * Radiation hormesis
 * Radiation impedance
 * Radiation implosion
 * Radiation intelligence
 * Radiation length
 * Radiation material science
 * Radiation monitoring
 * Radiation pressure
 * Radiation protection
 * Radiation scattering
 * Radiation stress
 * Radiation trapping
 * Radiational cooling
 * Radiative cooling
 * Radiative equilibrium
 * Radiative heat transfer
 * Radiative process
 * Radiative transfer
 * Radio-frequency induction
 * Radio-frequency quadrupole
 * Radio Ice Cerenkov Experiment
 * Radio astronomy
 * Radio frequency
 * Radio galaxy
 * Radio noise source
 * Radio occultation
 * Radio spectrum pollution
 * Radio waves
 * Radio window
 * Radioactive Substances Act 1993
 * Radioactive decay
 * Radioactive displacement law of Fajans and Soddy
 * Radioactive waste
 * Radioanalytical chemistry
 * Radiobiology
 * Radiochemistry
 * Radiodensity
 * Radiogenic nuclide
 * Radiographic equipment
 * Radiography
 * Radiohalo
 * Radioisotope piezoelectric generator
 * Radioisotope thermoelectric generator
 * Radioluminescence
 * Radiometer
 * Radiometric dating
 * Radiometry
 * Radion (physics)
 * Radiophysics
 * Radioscope
 * Radiosity (heat transfer)
 * Radium and radon in the environment
 * Radius of curvature (optics)
 * Radius of gyration
 * Rafael Bruschweiler
 * Rafael Ghazaryan
 * Rafael Sorkin
 * Rahul Mahajan (blogger)
 * Rainbow
 * Rainbow hologram
 * Rainer Blatt
 * Rainout (radioactivity)
 * Raja Ramanna
 * Rajaram Nityananda
 * Rajesh Gopakumar
 * Rajnath Singh
 * Ralph A. Sawyer
 * Ralph Asher Alpher
 * Ralph H. Fowler
 * Ralph Kronig
 * Ralph Lapp
 * Ralph Pudritz
 * Ralph von Frese
 * Ram pressure
 * Rama Bansil
 * Ramamurti Shankar
 * Raman Prinja
 * Raman Sundrum
 * Raman laser
 * Raman microscope
 * Raman scattering
 * Ramanuja Vijayaraghavan
 * Rammal Rammal
 * Ramond sector
 * Ramond–Ramond field
 * Ramsauer–Townsend effect
 * Randall J. LeVeque
 * Randall–Sundrum model
 * Random close pack
 * Random energy model
 * Random laser
 * Random matrix
 * Random phase approximation
 * Range (particle radiation)
 * Rangefinder
 * Rankine cycle
 * Rankine vortex
 * Rankine–Hugoniot conditions
 * Raoul Franklin
 * Raoul Pictet
 * Raoult's law
 * Raphael Tsu
 * Rapid phase transition
 * Rapid single flux quantum
 * Rapidity
 * Rare-earth magnet
 * Rare Earth hypothesis
 * Rare Isotope Accelerator
 * Rare Symmetry Violating Processes
 * Rarefaction
 * Rarita-Schwinger action
 * Rarita–Schwinger equation
 * Rashba effect
 * Rashid Sunyaev
 * Rate of heat flow
 * Rational conformal field theory
 * Raul Rabadan
 * Ravi Grover
 * Ray (optics)
 * Ray Kidder
 * Ray Mackintosh
 * Ray Streater
 * Ray tracing (physics)
 * Ray transfer matrix analysis
 * Raychaudhuri equation
 * Rayleigh distance
 * Rayleigh flow
 * Rayleigh law
 * Rayleigh number
 * Rayleigh scattering
 * Rayleigh–Bénard convection
 * Rayleigh–Gans approximation
 * Rayleigh–Jeans law
 * Rayleigh–Plesset equation
 * Rayleigh–Taylor instability
 * Raymond Chiao
 * Raymond Davis, Jr.
 * Raymond Gosling
 * Raymond Herb
 * Raymond Hide
 * Raymond Jeanloz
 * Raymond L. Orbach
 * Raymond Seeger
 * Raymond Thayer Birge
 * Raynor Johnson
 * Raziuddin Siddiqui
 * Reactimeter
 * Reaction (physics)
 * Reaction coordinate
 * Reaction field method
 * Reactionless drive
 * Reaction–diffusion–advection equation
 * Reactive centrifugal force
 * Reactor-grade plutonium
 * Reactor Experiment for Neutrino Oscillation
 * Reactor building
 * Reactor protection system
 * Reactor vessel
 * Real-is-positive convention
 * Real-time Neutron Monitor Database
 * Real gas
 * Real neutral particle
 * Rear flank downdraft
 * Reber Radio Telescope
 * Received noise power
 * Receiver (modulated ultrasound)
 * Reciprocal lattice
 * Reciprocal space
 * Reciprocating oscillation
 * Reciprocity (electrical networks)
 * Reciprocity (electromagnetism)
 * Recoil temperature
 * Recombination (cosmology)
 * Rectangular potential barrier
 * Rectilinear lens
 * Rectilinear propagation
 * Recuperator
 * Recurrence plot
 * Recurrence quantification analysis
 * Red adaptation goggles
 * Red clump
 * Red dwarf
 * Redlich–Kwong equation of state
 * Redshift
 * Redshift quantization
 * Redshift survey
 * Reduced mass
 * Reduced moderation water reactor
 * Reduced pressure
 * Reduced properties
 * Reduced temperature
 * Reduction criterion
 * Reed Research Reactor
 * Reeh–Schlieder theorem
 * Reentrant superconductivity
 * Reference beam
 * Reference noise
 * Reference surface
 * Reflectin
 * Reflection (physics)
 * Reflection coefficient
 * Reflection high-energy electron diffraction
 * Reflections on the Motive Power of Fire
 * Reflectivity
 * Reflectometric interference spectroscopy
 * Refraction
 * Refractive index
 * Refractive index contrast
 * Refractive indices
 * Refrigeration
 * Refrigerator
 * Regelation
 * Regenerative amplification
 * Regenerative fuel cell
 * Regge calculus
 * Regge theory
 * Reginald Victor Jones
 * Regnier de Graaf
 * Regularization (physics)
 * Reimar Lüst
 * Reiner Kruecken
 * Reinhard Meinel
 * Reinhard Oehme
 * Reinhold Bertlmann
 * Reinhold Ewald
 * Reinhold Mannkopff
 * Reionization
 * Reissner–Nordström metric
 * Relation between Schrödinger's equation and the path integral formulation of quantum mechanics
 * Relational quantum mechanics
 * Relational theory
 * Relationship between string theory and quantum field theory
 * Relative angular momentum
 * Relative density
 * Relative humidity
 * Relative intensity noise
 * Relative locality
 * Relative permeability
 * Relative permittivity
 * Relative pressure
 * Relative velocity
 * Relative viscosity
 * Relative wind
 * Relativistic Breit–Wigner distribution
 * Relativistic Doppler effect
 * Relativistic Euler equations
 * Relativistic Heavy Ion Collider
 * Relativistic aberration
 * Relativistic beaming
 * Relativistic dynamics
 * Relativistic electromagnetism
 * Relativistic electron beam
 * Relativistic heat conduction
 * Relativistic jet
 * Relativistic mechanics
 * Relativistic nuclear collisions
 * Relativistic particle
 * Relativistic plasma
 * Relativistic quantum chemistry
 * Relativistic similarity parameter
 * Relativistic speed
 * Relativistic wave equations
 * Relativity: The Special and the General Theory
 * Relativity of simultaneity
 * Relativity priority dispute
 * Relaxation (NMR)
 * Relaxation (physics)
 * Relaxation length
 * Relaxed stability
 * Relaxometry
 * Relic particles
 * Religious views of Albert Einstein
 * Reluctance
 * Remanence
 * Remission (spectroscopy)
 * Remo Ruffini
 * Remote plasma
 * Remote sensing
 * Renata Kallosh
 * Renate Loll
 * Renewable energy
 * Renewable energy debate
 * Renninger negative-result experiment
 * Renormalizable
 * Renormalization
 * Renormalization group
 * Renormalon
 * Replica trick
 * Reports on Progress in Physics
 * Representation theory of the Galilean group
 * Representation theory of the Poincaré group
 * Reprocessed uranium
 * Reptation Monte Carlo
 * Research Letters in Physics
 * Research reactor
 * Residual chemical shift anisotropy
 * Residual entropy
 * Residual flux density
 * Residual gas analyzer
 * Residual property (physics)
 * Residual strength
 * Residual stress
 * Resilience
 * Resist
 * Resistance distance
 * Resistive skin time
 * Resolved sideband cooling
 * Resonance
 * Resonance (particle)
 * Resonance (particle physics)
 * Resonance chamber
 * Resonance disaster
 * Resonant inelastic X-ray scattering
 * Resonant magnetic perturbations
 * Resonating valence bond theory
 * Resonator
 * Response reactions
 * Resputtering
 * Rest (physics)
 * Rest energy
 * Rest frame
 * Restoring force
 * Restricted open-shell Hartree–Fock
 * Resultant tone
 * Resummation
 * Retarded position
 * Retarded potential
 * Retarded time
 * Retentivity
 * Retreating blade stall
 * Retrocausality
 * Retroflect
 * Retrograde condensation
 * Retrogression heat treatment
 * Revaz Dogonadze
 * Reverberation
 * Reverberation chamber
 * Reverberation room
 * Reverse diffusion
 * Reverse leakage current
 * Reverse phase velocity
 * Reverse phasevelocity
 * Reversed field pinch
 * Reversible dynamics
 * Reversible process (thermodynamics)
 * Reversible reference system propagation algorithm
 * Reversing thermometer
 * Review of Scientific Instruments
 * Reviews of Geophysics
 * Reviews of Modern Physics
 * Reyn
 * Reynolds-averaged Navier–Stokes equations
 * Reynolds decomposition
 * Reynolds number
 * Reynolds operator
 * Reynolds stress
 * Reynolds transport theorem
 * Reza Mansouri
 * Rheology
 * Rheometer
 * Rheometry
 * Rheonomous
 * Rheopecty
 * Rheoscope
 * Rheoscopic fluid
 * Rho meson
 * Rhombohedral lattice system
 * Riabouchinsky solid
 * Riazuddin (physicist)
 * Riccardo Giacconi
 * Ricci calculus
 * Ricci curvature
 * Ricci decomposition
 * Richard A. Muller
 * Richard Arnowitt
 * Richard Becker (physicist)
 * Richard Beeching, Baron Beeching
 * Richard Bolt
 * Richard C. Lord
 * Richard C. Powell
 * Richard C. Tolman
 * Richard Christopher Carrington
 * Richard Clegg
 * Richard D. Gill
 * Richard D. James (scientist)
 * Richard D. Leapman
 * Richard Dalitz
 * Richard Davisson
 * Richard Dixon Oldham
 * Richard Duffin
 * Richard E. Berendzen
 * Richard E. Hayden
 * Richard E. Taylor
 * Richard Ellis (astronomer)
 * Richard Epp (physicist)
 * Richard Ernest Kronauer
 * Richard F. Post
 * Richard Feynman
 * Richard Franklin Humphreys
 * Richard Friend
 * Richard G. Compton
 * Richard Gans
 * Richard Garwin
 * Richard Gill (physicist)
 * Richard Glazebrook
 * Richard H. Price
 * Richard J. Gambino
 * Richard K. Yamamoto
 * Richard Keith Ellis
 * Richard L. Abrams
 * Richard Liboff
 * Richard Lindzen
 * Richard M. Weiner
 * Richard Makinson
 * Richard Massey
 * Richard Mollier
 * Richard P.A.C. Newman
 * Richard P. Turco
 * Richard Schoen
 * Richard Scott Perkin
 * Richard Sears McCulloh
 * Richard Sillitto
 * Richard T. Whitcomb
 * Richard Threlkeld Cox
 * Richard W. Ziolkowski
 * Richard Wolfson (physicist)
 * Richard von Mises
 * Richards equation
 * Richardson number
 * Richtmyer–Meshkov instability
 * Ricky J Sethi
 * Ridge lift
 * Ridged mirror
 * Ridley–Watkins–Hilsum theory
 * Riemann curvature tensor
 * Riemann solver
 * Riemann tensor (general relativity)
 * Riemannian Penrose inequality
 * Riemann–Silberstein vector
 * Rietdijk–Putnam argument
 * Rietveld refinement
 * Riggatron
 * Right-hand rule
 * Right hand grip rule
 * Rigid-body kinematics
 * Rigid body
 * Rigid body dynamics
 * Rigid rotor
 * Rijke tube
 * Rindler coordinates
 * Ring-imaging Cherenkov detector
 * Ring current
 * Ring laser
 * Ring laser gyroscope
 * Ring singularity
 * Ring wave guide
 * Rip current
 * Ripple (electrical)
 * Rise over thermal
 * Rishon model
 * Ritz method
 * Rivista del Nuovo Cimento
 * Roald Sagdeev
 * Rob Adam
 * Robbert Dijkgraaf
 * Robert A. Woodruff
 * Robert Adair (physicist)
 * Robert Alfano
 * Robert Andrews Millikan
 * Robert Arns
 * Robert Aymar
 * Robert Ayres (scientist)
 * Robert B. Laughlin
 * Robert B. Leighton
 * Robert Bacher
 * Robert Bindschadler
 * Robert Blinc
 * Robert Boyle
 * Robert Brout
 * Robert Bruce Lindsay
 * Robert C. Duncan (astrophysicist)
 * Robert C. Dynes
 * Robert Coleman Richardson
 * Robert Corey
 * Robert Cornog
 * Robert D. Maurer
 * Robert D. Richtmyer
 * Robert Delbourgo
 * Robert Dunkin
 * Robert Döpel
 * Robert E. Hopkins
 * Robert E. Vardeman
 * Robert Edward Bell
 * Robert Emden
 * Robert F. Beck
 * Robert F. Christy
 * Robert Fischell
 * Robert G. Chambers
 * Robert G. Greenler
 * Robert G. Shulman
 * Robert Geroch
 * Robert Griffiths (physicist)
 * Robert H. Dicke
 * Robert H. Lieberman
 * Robert H. Williams (physicist)
 * Robert Haynes
 * Robert Herman
 * Robert Hofstadter
 * Robert Hooke
 * Robert J. Birgeneau
 * Robert J. Lang
 * Robert J. Van de Graaff
 * Robert Jaffe
 * Robert K. Logan
 * Robert Karplus
 * Robert Kirby-Harris
 * Robert Kraichnan
 * Robert L. Byer
 * Robert L. Forward
 * Robert L. Hurt
 * Robert L. Park
 * Robert Leigh
 * Robert Lin
 * Robert Lyster Thornton
 * Robert M. L. Baker, Jr.
 * Robert Mallet
 * Robert Marshak
 * Robert Matthews (scientist)
 * Robert Mills (physicist)
 * Robert Morris Page
 * Robert Myers (physicist)
 * Robert Norman
 * Robert Noyce
 * Robert Ochsenfeld
 * Robert P. Madden
 * Robert Parr
 * Robert Pohl
 * Robert Pound
 * Robert R. Shannon
 * Robert R. Wilson
 * Robert Resnick
 * Robert Retherford
 * Robert Rosner
 * Robert Russell Newton
 * Robert S. Mulliken
 * Robert S. Shankland
 * Robert Shaw (physicist)
 * Robert Sproull
 * Robert Strutt, 4th Baron Rayleigh
 * Robert Thomas Jones (engineer)
 * Robert T. Siegel
 * Robert W. Bower
 * Robert W. Boyd
 * Robert W. Bussard
 * Robert W. Wood
 * Robert Wald
 * Robert Were Fox the Younger
 * Robert William Boyle
 * Robert Woodrow Wilson
 * Robert von Lieben
 * Roberto Abraham
 * Roberto Car
 * Roberto Merlin
 * Roberto Peccei
 * Roberto Salmeron
 * Roberval balance
 * Robijn Bruinsma
 * Robin Devenish
 * Robinson oscillator
 * Robinson–Dadson curves
 * Robley C. Williams
 * Robot kinematics
 * Robotic telescope
 * Roche limit
 * Rochon prism
 * Rock magnetism
 * Rocket engine nozzle
 * Rocket glider
 * Rod C. Alferness
 * Rod Crewther
 * Rod Cross
 * Roddam Narasimha
 * Roderich Moessner
 * Rodney Baxter
 * Rodney Cotterill
 * Rodney Jory
 * Rodney Marks (astrophysicist)
 * Rodney S. Ruoff
 * Rodolfo Gambini
 * Roe solver
 * Roentgen (unit)
 * Roentgen equivalent man
 * Rogallo wing
 * Roger Balian
 * Roger Cashmore
 * Roger Cowley
 * Roger Jones (physicist and entrepreneur)
 * Roger Penrose
 * Roger Temam
 * Rogue wave
 * Roland Benz
 * Roland Dobbs
 * Roland Dobrushin
 * Roland Hüttenrauch
 * Roland Omnès
 * Roland W. Schmitt
 * Rolf-Dieter Heuer
 * Rolf Hagedorn
 * Rolf Landauer
 * Rolf Maximilian Sievert
 * Rolf Michel
 * Rolf Widerøe
 * Roll center
 * Roll moment
 * Rollin film
 * Rolling
 * Rolling ball argument
 * Rolling cone motion
 * Rolling resistance
 * Roman Jackiw
 * Roman Ulrich Sexl
 * Roman pot
 * Roman ring
 * Ronald Collé
 * Ronald Drever
 * Ronald E. Cohen
 * Ronald Ernest Aitchison
 * Ronald F. Probstein
 * Ronald Fedkiw
 * Ronald Kantowski
 * Ronald McNair
 * Ronald N. Bracewell
 * Ronald Rivlin
 * Ronald W. Gurney
 * Ronald W. Yeung
 * Ronnie Bell
 * Ronold W. P. King
 * Room-temperature superconductor
 * Room acoustics
 * Room temperature
 * Root-mean-square speed
 * Roothaan equations
 * Roper resonance
 * Rosalind Franklin
 * Rosalyn Sussman Yalow
 * Rosatom
 * Rosemary Wyse
 * Roshko number
 * Ross H. McKenzie
 * Rossby number
 * Rossby wave
 * Rossiter–McLaughlin effect
 * Roswell Clifton Gibbs
 * Rotameter
 * Rotating black hole
 * Rotating furnace
 * Rotating radio transient
 * Rotating reference frame
 * Rotating spheres
 * Rotating tank
 * Rotating wave approximation
 * Rotation
 * Rotation-powered pulsar
 * Rotation around a fixed axis
 * Rotation number
 * Rotation operator (quantum mechanics)
 * Rotational Brownian motion
 * Rotational diffusion
 * Rotational energy
 * Rotational invariance
 * Rotational motion
 * Rotational speed
 * Rotational temperature
 * Rotational transition
 * Rotational–vibrational coupling
 * Roton
 * Rotordynamics
 * Rotor–stator interaction
 * Rouse model
 * Rouse number
 * Route dependence
 * Routhian
 * Rovibrational coupling
 * Rovibronic coupling
 * Rowland ring
 * Roy J. Glauber
 * Roy Kerr
 * Roy McWeeny
 * Roy Sambles
 * Roy Schwitters
 * Royal Astronomical Society
 * Rp-process
 * Ruark number
 * Rubber elasticity
 * Rubens tube
 * Rubidium standard
 * Ruby Payne-Scott
 * Ruby laser
 * Rudder ratio
 * Rudolf Clausius
 * Rudolf Fleischmann
 * Rudolf Grimm
 * Rudolf Haag
 * Rudolf Kingslake
 * Rudolf Kohlrausch
 * Rudolf Kompfner
 * Rudolf Ladenburg
 * Rudolf Luneburg
 * Rudolf M. Tromp
 * Rudolf Mössbauer
 * Rudolf Peierls
 * Rudolf Podgornik
 * Rudolf Schulten
 * Rudolf Seeliger
 * Rudolf Tomaschek
 * Rudolph Koenig
 * Rudolph Schild
 * Ruggero Santilli
 * Rui-Ming Xu
 * Rumble (noise)
 * Runaway breakdown
 * Rush D. Holt, Jr.
 * Rushbrooke inequality
 * Russell Alan Hulse
 * Russell Stannard
 * Russell Targ
 * Russell–Einstein Manifesto
 * Rustle noise
 * Rutherford backscattering spectrometry
 * Rutherford cable
 * Rutherford model
 * Rutherford scattering
 * Rydberg atom
 * Rydberg constant
 * Rydberg formula
 * Rydberg matter
 * Rydberg molecule
 * Rydberg state
 * Rydberg–Klein–Rees method
 * Rydberg–Ritz combination principle
 * Ryogo Kubo
 * Rytov number
 * Rényi entropy
 * Rømer's determination of the speed of light