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- E-foldingTime interval in science
- E. C. George SudarshanIndian-American theoretical physicist
- E. T. S. AppleyardEdgar Thomas Snowden Appleyard (14 June 1904 – 15 June 1939) was a physicist and pioneer i
- Earnshaw's theoremStatement on equilibrium in electromagnetism
- Earth tideDisplacement of the solid Earth's surface caused by the gravity of the Moon and Sun
- EchoReflection of sound delayed after direct sound as heard by listener
- Eckart conditionsConditions in the second step of the Born-Oppenheimer approximation
- École normale supérieure de jeunes fillesThe École normale supérieure de jeunes filles (also, École normale supérieure de Sèvres) w
- École normale supérieure de lettres et sciences humainesThe École normale supérieure lettres et sciences humaines (ENS LSH) was an elite French gr
- Eddington numberNumber of protons in the observable universe
- Eddington–Finkelstein coordinatesCoordinate system used in general relativity
- Eddy (fluid dynamics)Swirling and reverse current in a turbulent flow regime
- Eddy currentLoops of electric current induced within conductors by a changing magnetic field
- Eddy diffusionMixing of fluids due to eddy currents
- Edeowie glassNatural glass found in South Australia
- Edge-localized modeAn edge-localized mode (ELM) is a plasma instability occurring in the edge region of a tok
- Edgeworth David MedalAward for young scientists in Australia
- Edinburgh CrystalType of cut glass crystal manufactured in Scotland
- Edme MariotteFrench physicist and priest
- Edmond BecquerelFrench physicist (1820–1891)
- Édouard BranlyFrench physicist and inventor (1844–1940)
- Edsel CorsairThe Edsel Corsair is an automobile that was produced and sold by Edsel in 1958 and 1959. F
- Edward A. GuggenheimEdward Armand Guggenheim FRS (11 August 1901 – 9 August 1970) was an English physical chem
- Edward AndradeBritish physicist
- Edward Arthur MilneBritish astrophysicist and mathematician
- Edward BullardBritish geophysicist (1907–1980)
- Edward CondonAmerican nuclear physicist (1902–1974)
- Edward CreutzAmerican physicist (1913–2009)
- Edward George BowenWelsh physicist (1911–1991)
- Edwin HallAmerican physicist (1855–1938)
- Effective actionQuantum version of the classical action
- Effective atomic number (compounds and mixtures)Approximate atomic number calculated for materials with many elements
- Effective field theoryType of approximation to an underlying physical theory
- Effective mass (solid-state physics)Mass of a particle when interacting with other particles
- Effective mass (spring–mass system)Parameter in physics problems
- Effective medium approximationsMethod of approximating the properties of a composite material
- Effective nuclear chargeMeasurement in atomic physics
- Effective stressThe effective stress can be defined as the stress, depending on the applied tension and po
- Effects of ionizing radiation in spaceflightAstronauts are exposed to approximately 72 millisieverts (mSv) while on six-month-duration
- EffusionProcess of a gas escaping through a small hole
- Egyptian bluePigment used in ancient Egypt
- Ehlers–Geren–Sachs theoremThe Ehlers–Geren–Sachs theorem, published in 1968 by Jürgen Ehlers, P. Geren and Rainer K.
- Ehrenfest paradoxParadox in special relativity
- Ehrenfest theoremTheorem in quantum mechanics
- Eightfold way (physics)Classification scheme for hadrons
- Eikonal approximationTheoretical physics method in wave scattering equations
- Eikonal equationNon-linear partial differential equation encountered in problems of wave propagation
- EinselectionProcess in quantum mechanics
- Einstein coefficientsQuantities describing probability of absorption or emission of light
- Einstein field equationsField-equations in general relativity
- Einstein relation (kinetic theory)Equation in Brownian motion
- Einstein ringFeature seen when light is gravitationally lensed by an object
- Einstein solidModel of a crystalline solid
- Einstein synchronisationEinstein synchronisation (or Poincaré–Einstein synchronisation) is a convention for synchr
- Einstein–Brillouin–Keller methodThe Einstein–Brillouin–Keller (EBK) method is a semiclassical technique (named after Alber
- Einstein–Cartan theoryClassical theory of gravitation
- Einstein–Hilbert actionConcept in general relativity
- Einstein–Oppenheimer relationshipAlbert Einstein and J. Robert Oppenheimer were twentieth century physicists who made pione
- Einstein–Podolsky–Rosen paradoxHistorical critique of quantum mechanics
- Einstein–Rosen metricExact gravitational-wave solution to Einstein's field equations
- Einstein@HomeVolunteer computing project
- ElastanceInverse of electrical capacitance
- Elastic collisionCollision in which kinetic energy is conserved
- Elastic energyForm of energy
- Elastic instabilityElastic instability is a form of instability occurring in elastic systems, such as bucklin
- Elastic modulusPhysical property that measures stiffness of material
- Elastic scatteringParticle collisions conserving kinetic energy
- Elasticity (physics)Physical property when materials or objects return to original shape after deformation
- Elasto-capillarityPhysical phenomenon
- Eleanor R. AdairAmerican scientist
- ElectretObject with trapped electrical charge
- Electric arcElectrical breakdown of a gas that results in an ongoing electrical discharge
- Electric chargeElectromagnetic property of matter
- Electric currentFlow of electric charge
- Electric dipole momentMeasure of positive and negative charges
- Electric dipole spin resonanceElectric dipole spin resonance (EDSR) is a method to control the magnetic moments inside a
- Electric displacement fieldVector field related to displacement current and flux density
- Electric fieldPhysical field surrounding an electric charge
- Electric fluxMeasure of electric field through surface
- Electric heatingProcess in which electrical energy is converted to heat
- Electric machineElectron flow-powered mechanical device
- Electric potentialLine integral of the electric field
- Electric potential energyPotential energy that results from conservative Coulomb forces
- Electric powerRate at which electrical energy is transferred by an electric circuit
- Electric sparkAbrupt electrical discharge through an ionised channel
- Electric susceptibilityDegree of polarization
- Electric-field screeningDamping of electric fields
- Electrical conductorObject or material which allows the flow of electric charge with little energy loss
- Electrical elementIdealized versions of real electronic components used in circuit analysis
- Electrical impedanceOpposition of a circuit to a current when a voltage is applied
- Electrical insulation paperElectrical insulation papers are paper types that are used as electrical insulation in man
- Electrical mobilityAbility of charged particles to move through a medium in response to an electric field
- Electrical networkAssemblage of connected electrical elements
- Electrical reactanceOpposition to current by inductance or capacitance
- Electrical resistance and conductanceOpposition to the passage of an electric current
- Electrical resistivity and conductivityMeasure of a substance's ability to resist or conduct electric current
- Electrical resonanceCanceling impedances at a particular frequency
- Electrical susceptanceImaginary part of electrical admittance
- ElectricityPhenomena related to electric charge
- Electricity and Magnetism (book)Edward M. Purcell's 1965 Electromagnetism textbook
- Electro-osmosisMovement of liquid through a conduit due to electric potential
- Electrocaloric effectTemperature change of a material under an electric field
- ElectrodeElectrical conductor used to make contact with nonmetallic parts of a circuit
- ElectrohydrodynamicsStudy of electrically conducting fluids in the presence of electric fields
- ElectroluminescenceOptical and electrical phenomenon
- ElectromagnetMagnet that creates a magnetic field through an electric current
- Electromagnetic absorbersElectromagnetic absorbers are specifically chosen or designed materials that can inhibit t
- Electromagnetic absorption by waterThe absorption of electromagnetic radiation by water depends on the state of the water.
- Electromagnetic electron waveIn plasma physics, an electromagnetic electron wave is a wave in a plasma which has a magn
- Electromagnetic fieldElectric and magnetic fields produced by moving charged objects
- Electromagnetic four-potentialRelativistic vector field
- Electromagnetic inductionProduction of voltage by a varying magnetic field
- Electromagnetic interferenceDisturbance in an electrical circuit due to external sources of radio waves
- Electromagnetic massPhysical concept
- Electromagnetic metasurfaceType of artificial sheet material
- Electromagnetic pulseBurst of electromagnetic energy
- Electromagnetic radiationPhysical model of propagating energy
- Electromagnetic spectrumFull range of electromagnetic radiation frequencies
- Electromagnetic stress–energy tensorIn relativistic physics, the electromagnetic stress–energy tensor is the contribution to t
- Electromagnetic tensorMathematical object that describes the electromagnetic field in spacetime
- Electromagnetic wave equationPartial differential equation used in physics
- Electromagnetically induced acoustic noiseType of audible sound
- Electromagnetically induced gratingElectromagnetically induced grating (EIG) is an optical interference phenomenon where an i
- ElectromagnetismFundamental interaction between charged particles
- Electromotive forceElectrical action produced by a non-electrical source
- ElectronElementary particle with negative charge
- Electron avalancheProcess in electrical breakdown
- Electron captureProcess in which a proton-rich nuclide absorbs an inner atomic electron
- Electron channelling contrast imagingMicroscope diffraction technique
- Electron configurationMode of arrangement of electrons in different shells of an atom
- Electron crystallographyMethod to determine atomic positions in solids using an electron microscope
- Electron cyclotron resonancePhenomenon observed in physics
- Electron degeneracy pressureRepulsive force in quantum mechanics
- Electron densityProbability density of electrons being somewhere
- Electron diffractionBending of electron beams due to electrostatic interactions with matter
- Electron gunElectrical component producing a narrow electron beam
- Electron holeConceptual opposite of an electron
- Electron ionizationIonization technique
- Electron magnetic momentSpin of an electron
- Electron mobilityQuantity in solid-state physics
- Electron multiplierVacuum tube structure
- Electron neutrinoSubatomic particle
- Electron opticsElectron trajectories in electromagnetic fields
- Electron orbital imagingElectron orbital imaging is an X-ray synchrotron technique used to produce images of elect
- Electron paramagnetic resonanceTechnique to study materials that have unpaired electrons
- Electron scatteringDeviation of electrons from their original trajectories
- Electron shellPrincipal energy levels in atomic physics
- Electron-beam lithographyLithographic technique that uses a scanning beam of electrons
- Electron-beam physical vapor depositionForm of physical vapor deposition
- Electron-beam processingUse of high-energy electrons to treat an object
- Electron-beam weldingUse of accelerated electrons to join metal parts via melting
- Electron-capture dissociationElectron-capture dissociation (ECD) is a method of fragmenting gas-phase ions for structur
- Electron-on-helium qubitQuantum bit
- Electron–positron annihilationCollision causing gamma ray emission
- Electronic anticoincidenceMethod of eliminating background events in particle physics
- Electronic band structureDescribes the range of energies of an electron within the solid
- Electronic properties of grapheneGraphene is a semimetal whose conduction and valence bands meet at the Dirac points, which
- Electronic speckle pattern interferometryElectronic speckle pattern interferometry (ESPI), also known as TV holography, is a techni
- Electronic symbolPictogram used to represent various electrical and electronic devices or functions
- ElectrophorusSimple electrostatic generator invented in 1762
- ElectroreflectanceElectro reflectance
- Electrorheological fluidType of chemical suspension
- ElectroscopeEarly scientific instrument to detect charge
- Electrospray ionizationTechnique used in mass spectroscopy
- Electrostatic dischargeSudden flow of electric current between two electrically charged objects by contact
- Electrostatic generatorDevice that generates electrical charge on a high voltage electrode
- Electrostatic inductionSeparation of electric charge due to presence of other charges
- ElectrostaticsStudy of still or slow electric charges
- Electrovacuum solutionMathematical solution in general relativity
- Electroweak interactionUnified description of electromagnetism and the weak interaction
- Eleftherios EconomouEleftherios Ν. Economou (Greek: Ελευθέριος Ν. Οικονόμου, romanized: Elefthérios N. Oikonóm
- Elementary chargeCharge carried by one electron
- Elementary particleSubatomic particle having no substructure
- Elements of Dynamic1878 scientific reference book by William Kingdon Clifford
- Elephter AndronikashviliGeorgian physicist
- Eleven-dimensional supergravitySupergravity in eleven dimensions
- Elisabeth GiacobinoFrench physicist (born 1946)
- Elitzur–Vaidman bomb testerQuantum mechanics thought experiment
- Elizabeth BeiseAmerican professor of physics
- Elliott CressonElliott Cresson (March 2, 1796 – February 20, 1854) was an American philanthropist who gav
- Elliott Cresson MedalAward
- Elliott formulaFormula for solid emission and absorption
- EllipsometryOptical technique for characterizing thin films
- Elliptic orbitKepler orbit with an eccentricity of less than one
- Elliptical polarizationPolarization of electromagnetic radiation
- Ellis R. Lippincott AwardAmerican award in vibrational spectroscopy
- Elwin Bruno ChristoffelGerman mathematician and physicist (1829–1900)
- Embodied energySum of all the energy required to produce any goods or services
- Emden–Chandrasekhar equationIn astrophysics, the Emden–Chandrasekhar equation is a dimensionless form of a Poisson equ
- Emil MartinecAmerican theoretical physicist
- Émile AmagatÉmile Hilaire Amagat (2 January 1841 in Saint-Satur – 15 February 1915) was a French physi
- Émile ClapeyronFrench engineer and physicist (1799–1864)
- Emission spectrumFrequencies of light emitted by atoms or chemical compounds
- EmissivityCapacity of an object to radiate electromagnetic energy
- Endergonic reactionChemical reaction which requires more energy to initiate than it produces
- Endoreversible thermodynamicsSubset of irreversible thermodynamics
- Endothermic processThermodynamic process absorbing energy from its surroundings
- EnergyPhysical quantity
- Energy applications of nanotechnologyAs the world's energy demand continues to grow, the development of more efficient and sust
- Energy cascadeEnergy transfer between scales of motion
- Energy conditionMathematics of general relativity
- Energy conversion efficiencyRatio between the useful output and the input of a machine
- Energy densityEnergy per volume
- Energy levelDifferent states of quantum systems
- Energy operatorIn quantum mechanics, energy is defined in terms of the energy operator, acting on the wav
- Energy transformationProcess of changing energy
- Energy–momentum relationRelativistic equation relating total energy to mass and momentum
- English Engineering UnitsSystem of measurement used in the United States
- Engraved glassEngraved glass is a type of decorated glass that involves shallowly engraving the surface
- Ensemble (mathematical physics)Idealization of a large number of atomic-sized systems
- Ensemble interpretationConcept in Quantum mechanics
- EnthalpyMeasure of energy in a thermodynamic system
- Enthalpy of fusionEnthalpy change when a substance melts
- Enthalpy of vaporizationEnergy to convert a liquid substance to a gas at a given pressure
- Entrance pupilOptical image of the physical aperture stop
- Entropic gravityEntropic gravity, also known as emergent gravity, is a theory in modern physics that descr
- EntropyProperty of a thermodynamic system
- Entropy (classical thermodynamics)Measure of disorder within thermodynamic systems
- Entropy (energy dispersal)Interpretation of entropy as a measure of the spread of energy
- Entropy (order and disorder)Interpretation of entropy as the change in arrangement of a system's particles
- Entropy (statistical thermodynamics)Concept
- Entropy and lifeInfluence of thermodynamics on evolution
- Entropy as an arrow of timeUse of the second law of thermodynamics to distinguish past from future
- Entropy of mixingIncrease in the total entropy of a compound system after mixing
- Envelope (waves)Smooth curve outlining the extremes of an oscillating signal
- Environmental impact of wind powerThe environmental impact of electricity generation from wind power is minor when compared
- EpitaxyCrystal growth process relative to the substrate used as seed
- Equation of stateEquation describing a state of matter under a given set of conditions
- Equations for a falling bodyMathematical description of a body in free fall
- Equations of motionEquations that describe the behavior of a physical system
- Equilibrium thermodynamicsField of scientific study
- Equinoctial hoursAn equinoctial hour is one of the 24 equal parts of the full day (which includes daytime a
- Equipartition theoremTheorem in classical statistical mechanics
- EquipotentialRegion in space where every point is at the same potential
- Equivalence principleHypothesis that inertial and gravitational masses are equivalent
- Eric ZaslowAmerican mathematical physicist
- Ericsson cycleType of thermodynamic cycle
- Erik VerlindeDutch theoretical physicist
- Ernest CourantAmerican physicist (1920–2020)
- Ernst R. G. EckertErnst Rudolph Georg Eckert (September 13, 1904 – July 8, 2004) was an Austrian American en
- Erwin Friedrich WagnerErwin Friedrich Wagner (born 25 November 1950) is an Austrian biochemist known for his res
- Erwin Wilhelm MüllerErwin Wilhelm Müller (or Mueller) (June 13, 1911 – May 17, 1977) was a German physicist wh
- Etching (microfabrication)Etching is used in microfabrication to chemically remove layers from the surface of a wafe
- Eternalism (philosophy of time)Philosophical view that there is no correct way of perceiving the passage of time
- Ettore MajoranaItalian physicist (born 1906, disappeared 1938)
- Euclidean quantum gravityIn theoretical physics, Euclidean quantum gravity is a version of quantum gravity. It seek
- Eugen GoldsteinGerman physicist (1850–1930)
- Eugene T. BoothAmerican nuclear physicist (1912–2004)
- Euler equations (fluid dynamics)Set of quasilinear hyperbolic equations governing adiabatic and inviscid flow
- Euler–Lagrange equationSecond-order partial differential equation describing motion of mechanical system
- Euler's critical loadEuler's critical load or Euler's buckling load is the compressive load at which a slender
- Euler's equations (rigid body dynamics)Quasilinear first-order ordinary differential equation
- Euler's laws of motionExtend Newton's laws of motion to rigid bodies
- Eurasian tealThe Eurasian teal (Anas crecca), common teal, or Eurasian green-winged teal is a common an
- Eureka (organisation)Eureka (often abbreviated as E!, or Σ!) is an intergovernmental organisation for research
- Europa-LehrmittelThe Verlag Europa-Lehrmittel Nourney, Vollmer GmbH & Co. KG (English: European educational
- Eva SilversteinAmerican string theory and cosmologist
- Evanescent fieldType of field where the net flow of electromagnetic energy is zero
- EvaporationVaporization of a liquid from its surface
- Even and odd atomic nucleiNuclear physics classification method
- Everette Lee DeGolyerAmerican oil executive, geophysicist, and philanthropist
- Evgeny Aramovich AbramyanRussian physicist (1930–2014)
- Evgeny LifshitzSoviet physicist (1915–1985)
- Exact solutions in general relativityIn general relativity, an exact solution is a (typically closed form) solution of the Eins
- Exchange interactionQuantum mechanical effect
- Excited stateQuantum state of a system
- ExcitonQuasiparticle which is a bound state of an electron and an electron hole
- Exergy efficiencyIn thermal engineering, exergy efficiency (also known as the second-law efficiency or rati
- Exothermic processThermodynamic process that releases energy to its surroundings
- Exotic atomAtoms composed of exotic particles
- Exotic baryonIn particle physics, exotic baryons are a type of hadron (bound states of quarks and gluon
- Exotic hadronExotic hadrons are subatomic particles composed of quarks and gluons, but which – unlike "
- Exotic matterPhysics term for multiple concepts
- Expansion valve (steam engine)An expansion valve is a device in steam engine valve gear that improves engine efficiency.
- Expectation value (quantum mechanics)Expected value of a quantum measurement
- Expedition 50Expedition 50 was the 50th expedition to the International Space Station.
- Experimental physicsCategory of disciplines and sub-disciplines in Physics
- Explicit symmetry breakingSymmetry breaking in physics
- ExplosionSudden release of heat and gas
- Eye protectionProtective gear for the eyes
