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R-factor (crystallography)

R-hadron

R-parity

R-process

R-symmetry

Rabbit (nuclear engineering)

Rabi cycle

Rabi frequency

Rabi problem

Racah, Giulio (Yoel)

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 chemistry

Radiation damping

Radiation-dominated era

Radiation flux

Radiation hormesis

Radiation impedance

Radiation implosion

Radiation intelligence

Radiation length

Radiation material science

Radiation monitoring

Radiation pressure

Radiation protection

Radiation scattering

Radiation of sound

Radiation stress

Radiation trapping

Radiational cooling

Radiative cooling

Radiative equilibrium

Radiative heat transfer

Radiative process

Radiative transfer

Radio frequency

Radio-frequency induction

Radio-frequency quadrupole

Radio Ice Cerenkov Experiment

Radio noise source

Radio occultation

Radio spectrum pollution

Radio waves

Radio window

Radioactive decay, Radioactivity

Radionuclide

Radium

Radon

Rainwater, Leo James

RaLa Experiment

Raman, Chandrasekhara Venkata

Raman laser

Raman Research Institute

Ramsauer–Townsend effect

Ramsey, Norman Foster

Randall–Sundrum model

Random Matrix Theory in Physics

Random Partitions

Random Walks in Random Environments

Rankine cycle

Rapoport, Lev Pavlovich

Rare Isotope Accelerator

Ray tracing (physics)

Ray transfer matrix analysis

Rayleigh, John Strutt, 3rd Baron

Rayleigh dissipation function

Rayleigh Medal

RC time constant

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
Reflection
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

Regularization (physics)

Reionization

Reissner–Nordström metric

Relation between Schrödinger's equation and the path integral formulation of quantum mechanics
Relational quantum mechanics
Relational theory

Relationship between mathematics and physics

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 Addition of Velocity | Special Relativity Ch. 6 (V)

Relativistic beaming

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 General Theory
Relativity of simultaneity

Relativity of Simultaneity | Special Relativity Ch. 4 (V)

Relativity priority dispute
Relaxation (NMR)
Relaxation (physics)
Relaxation length
Relaxed stability
Relaxometry
Relic particles
Religious views of Albert Einstein
Reluctance
Remanence
Remission (spectroscopy)

Remote plasma
Remote sensing

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
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

Reverberation
Reverberation chamber
Reverberation room
Reverse diffusion
Reverse leakage current
Reverse phase velocity
Reversed field pinch
Reversible dynamics
Reversible process (thermodynamics)
Reversible reference system propagation algorithm
Reversing thermometer
Review of Scientific Instruments
Reviews of Geophysics
Reviews of Geophysics and Space physics

Reviews of Modern Physics

Reynolds, Osborne

Reynolds-averaged Navier–Stokes equations
Reynolds decomposition
Reynolds number
Reynolds operator
Reynolds stress
Reynolds transport theorem

RF antenna ion source

RHEED-TRAXS

Rhenium

Rheology
Rheometer
Rheometry

Rheonomous

Rheopecty
Rheoscope
Rheoscopic fluid

Rhodium

Rho meson

Rhombohedral lattice system
Riabouchinsky solid

Ricci calculus
Ricci curvature
Ricci decomposition

Richardson, Robert Coleman

Richards equation
Richardson number

Richter, Burton

Richtmyer–Meshkov instability

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

RKKY interaction

RNS formalism

Robinson oscillator
Robinson–Dadson curves

Robot kinematics
Robotic telescope

Rocard, Yves

Roche limit
Rochon prism
Rock magnetism
Rocket engine nozzle
Rocket glider

Roe solver
Roentgen (unit)
Roentgen equivalent man

Roentgenium

Rogallo wing

Rogue wave

ROI PAC

Roll center
Roll moment
Rollin film
Rolling
Rolling ball argument
Rolling cone motion
Rolling resistance

Röntgen, Wilhelm Conrad

Room-temperature superconductor
Room acoustics
Room temperature

ROOT

Root-mean-square speed

Roothaan equations

Roper resonance

Rosatom

Rosen, Nathan

Roshko number

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 around a fixed axis

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

Rovelli, Carlo

Rovibrational coupling
Rovibronic coupling
Rowland ring

Rp-process

RRKM theory

RT (energy)

Ruark number
Rubber elasticity

Rubbia, Carlo

Rubidium

Rubidium standard

Ruby laser

Rudder ratio

Rumble (noise)
Runaway breakdown

Rushbrooke inequality

Ruska, Ernst August Friedrich

Russell–Einstein Manifesto
Rustle noise

Ruthenium

Rutherford, Ernest

Rutherford backscattering spectrometry
Rutherford cable
Rutherford model

Rutherford scattering

Rutherfordium

Rydberg, Johannes Robert

Rydberg atom
Rydberg constant
Rydberg formula
Rydberg matter
Rydberg molecule
Rydberg state
Rydberg–Klein–Rees method
Rydberg–Ritz combination principle

Rytov number

R1 (nuclear reactor)

R136a1

R4 nuclear reactor

RA-1 Enrico Fermi

Εγκυκλοπαίδεια Αστρονομίας

Εγκυκλοπαίδεια Βιολογίας

Εγκυκλοπαίδεια Γεωλογίας

Εγκυκλοπαίδεια Διαστημικής Τεχνολογίας

Εγκυκλοπαίδεια Ιατρικής

Εγκυκλοπαίδεια Μαθηματικών

Εγκυκλοπαίδεια Πληροφορικής

Εγκυκλοπαίδεια Τεχνολογίας

Εγκυκλοπαίδεια Χημείας

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