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 (physicist) Robert K. Logan Robert Karplus Robert Kirby-Harris Robert Kraichnan Robert L. Byer Robert L. Forward Robert L. Hurt Robert L. Park Robert Leigh (physicist) 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