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- N = 4 supersymmetric Yang–Mills theorySuperconformal Yang–Mills theory
- N-body problemProblem in physics and celestial mechanics
- N-slit interferometerThe N-slit interferometer is an extension of the double-slit interferometer also known as
- N-slit interferometric equationQuantum mechanics was first applied to optics, and interference in particular, by Paul Dir
- NA48 experimentThe NA48 experiment was a series of particle physics experiments in the field of kaon phys
- Naïve physicsUntrained human perception of basic physical phenomena
- NanomeshThe nanomesh is an inorganic nanostructured two-dimensional material, similar to graphene.
- NanometreUnit of length
- NanoparticleParticle with size less than 100 nm
- NanosecondOne billionth of a second
- NanotribologyNanotribology is the branch of tribology that studies friction, wear, adhesion and lubrica
- Natalia ToroNatalia Toro (born c. 1985) is an American particle physicist known for her pioneering wor
- Nathan SeibergIsraeli American theoretical physicist
- National High Magnetic Field LaboratoryMagnetism research institute in the United States
- Natural nuclear fission reactorNaturally occurring uranium self-sustaining nuclear chain reactions
- Nature MaterialsNature Materials is a monthly peer-reviewed scientific journal published by Nature Portfol
- Navier–Stokes equationsEquations of motion for viscous fluids
- Navy blueDark shade of blue
- Near and far fieldRegions of an electromagnetic field
- Negative energyNegative energy is a concept used in physics to explain the nature of certain fields, incl
- Negative-index metamaterialMaterial with a negative refractive index
- Neil TurokSouth African theoretical physicist
- Net forceVector sum of all forces acting upon a particle or body
- Network analysis (electrical circuits)Determining all voltages and currents within an electrical network
- Network performanceNetwork performance refers to measures of service quality of a network as seen by the cust
- Neue Deutsche TodeskunstNeue Deutsche Todeskunst (NDT, lit. "New German Death Art") is a musical genre that develo
- NeurophysicsStudy of the nervous system with physics
- Neutral particle oscillationQuantum mechanical transmutation of neutral particles
- NeutrinoElementary particle with extremely low mass
- Neutrino oscillationPhenomenon in which a neutrino changes lepton flavor as it travels
- Neutrinoless double beta decayTheorized type of radioactive decay
- NeutronSubatomic particle with no charge
- Neutron activationInduction of radioactivity by neutron radiation
- Neutron activation analysisNeutron activation analysis (NAA) is a nuclear process used for determining the concentrat
- Neutron backscatteringNeutron backscattering is one of several inelastic neutron scattering techniques. Backscat
- Neutron captureAtomic nuclear process
- Neutron cross sectionMeasure of neutron interaction likelihood
- Neutron emissionType of radioactive decay
- Neutron imagingNeutron imaging is the process of making an image with neutrons. The resulting image is ba
- Neutron interferometerIn physics, a neutron interferometer is an interferometer capable of diffracting neutrons,
- Neutron numberNumber of neutrons in a nuclide
- Neutron radiationIonizing radiation that presents as free neutrons
- Neutron scatteringPhysical phenomenon
- Neutron sourceDevice that emits neutrons
- Neutron tomographyNeutron tomography is a form of computed tomography involving the production of three-dime
- Neutron transportNeutron transport (also known as neutronics) is the study of the motions and interactions
- Newman–Penrose formalismNotation in general relativity
- Newton's law of coolingPhysical law relating heat loss to temperature difference
- Newton's law of universal gravitationClassical statement of gravity as force
- Newton's laws of motionLaws in physics about force and motion
- Newton's ringsOptical interference pattern of concentric rings
- Newtonian dynamicsFormulation of physics
- Newtonian fluidType of fluid
- Newtonian potentialIn mathematics, the Newtonian potential or Newton potential is an operator in vector calcu
- Next-to-Minimal Supersymmetric Standard ModelExtension to the MSSM solving the mu-problem
- Nicholas CallanIrish physicist and Catholic priest (1799–1864)
- Nicholas ReadNicholas Read FRS is an American physicist, noted for his work on strongly interacting qua
- NichromeFamily of alloys of mainly nickel and chromium
- Nicola CabibboItalian physicist (1935-2010)
- Nicolás Cabrera (physicist)Spanish physicist (1913–1989)
- Nikita NekrasovRussian mathematical and theoretical physicist
- Nikolay BogolyubovSoviet mathematician and theoretical physicist (1909–1992)
- Nikolay DollezhalRussian engineer of Czech origin
- Nikolay SemyonovSoviet physicist and chemist (1896–1986)
- Nikon F-mountLens mount
- Nima Arkani-HamedAmerican-Canadian physicist (born 1972)
- NimatronThe Nimatron was an electro-mechanical machine that played Nim. It was first exhibited in
- Nippon Sheet GlassJapanese Glass Manufacturer
- No-hair theoremBlack holes are characterized only by mass, charge, and spin
- Nobel Prize in PhysicsOne of five prizes established in 1895 by Alfred Nobel
- Node (physics)Point with minimum wave amplitude
- Noether's theoremStatement relating differentiable symmetries to conserved quantities
- NoiseUnwanted sound
- Non-abelian groupIn mathematics, and specifically in group theory, a non-abelian group, sometimes called a
- Non-autonomous mechanicsNon-autonomous mechanics describe non-relativistic mechanical systems subject to time-depe
- Non-equilibrium thermodynamicsBranch of thermodynamics
- Non-inertial reference frameReference frame that undergoes acceleration with respect to an inertial frame
- Non-ionizing radiationLess harmful range of electromagnetic energy
- Non-Newtonian fluidType of fluid
- Non-relativistic gravitational fieldsWithin general relativity (GR), Einstein's relativistic gravity, the gravitational field i
- Noncommutative quantum field theoryQuantum field theory using noncommutative mathematics
- Nondestructive testingType of analysis technique
- Nonlinear acousticsNonlinear acoustics (NLA) is a branch of physics and acoustics dealing with sound waves of
- Nonlinear metamaterialA nonlinear metamaterial is an artificially constructed material that can exhibit properti
- Nonlinear opticsBranch of physics
- Nonlinear partial differential equationPartial differential equation with nonlinear terms
- Noor Muhammad ButtPakistani physicist (born 1936)
- Normal (geometry)Line or vector perpendicular to a curve or a surface
- Normal forceForce exerted on an object by a body with which it is in contact, and vice versa
- Normal modePattern of oscillating motion in a system
- Novette laserNovette was a two beam neodymium glass (phosphate glass) testbed laser built at Lawrence L
- NozzleDevice used to direct the flow of a fluid
- Nu (Greek)Thirteenth letter in the Greek alphabet
- Nuclear astrophysicsIntersection of nuclear physics and astrophysics
- Nuclear binding energyMinimum energy required to separate particles within a nucleus
- Nuclear chain reactionWhen one nuclear reaction causes more
- Nuclear drip lineAtomic nuclei decay delimiter
- Nuclear fissionReaction that splits an atomic nucleus
- Nuclear forceForce that acts between the protons and neutrons of atoms
- Nuclear fuel cycle information systemInternational Atomic Energy Agency database
- Nuclear fusionReaction that combines atomic nuclei
- Nuclear isomerMetastable excited state of a nuclide
- Nuclear magnetic momentMagnetic moment of an atomic nucleus
- Nuclear magnetic resonanceSpectroscopic technique based on change of nuclear spin state
- Nuclear magnetic resonance quantum computerNuclear magnetic resonance quantum computing (NMRQC) is one of the several proposed approa
- Nuclear magnetic resonance spectroscopyLaboratory technique
- Nuclear matterSystem of interacting nucleons
- Nuclear physicsField of physics that studies atomic interactions
- Nuclear reactionTransformation of a nuclide to another
- Nuclear structureStructure of the atomic nucleus
- Nuclear transmutationConversion of an atom from one element to another
- Nucleate boilingIn fluid thermodynamics, nucleate boiling is a type of boiling that takes place when the s
- NucleationInitial step in the phase transition or molecular self-assembly of a substance
- NucleonComponent of an atomic nucleus
- Nucleon magnetic momentIn physics, proton and neutron magnetism
- Nucleon pair breaking in fissionNucleon pair breaking in fission has been an important topic in nuclear physics for decade
- NucleosynthesisProcess of creating new atomic nuclei from existing nucleons
- Nut (food)Foods called nuts, which may be true nuts or seeds, drupes or legumes