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- M-theoryFramework of superstring theory
- M. Jamal DeenMohamed Jamal Deen CM is an Indo-Guyanese professor and Senior Canada Research Chair in In
- Mach numberDimensionless quantity in fluid dynamic
- Mach–Zehnder interferometerDevice to determine relative phase shift
- Macroscopic quantum phenomenaMacroscopic processes showing quantum behavior
- Macroscopic scaleLength scale which are visible to the naked eye
- MagentaColor
- Magic number (physics)Number of protons or neutrons that make a nucleus particularly stable
- MagnetObject that has a magnetic field
- Magnetic anisotropyIn condensed matter physics, magnetic anisotropy describes how an object's magnetic proper
- Magnetic circuitClosed loop path containing a magnetic flux
- Magnetic complex reluctanceMagnetic complex reluctance (SI Unit: H−1) is a measurement of a passive magnetic circuit
- Magnetic confinement fusionApproach to controlled thermonuclear fusion using magnetic fields
- Magnetic coreObject used to guide and confine magnetic fields
- Magnetic dipoleMagnetic analogue of the electric dipole
- Magnetic energyEnergy from the work of a magnetic force
- Magnetic fieldProperty of space that quantifies the magnetic influence at a given location
- Magnetic fluxSurface integral of the magnetic field
- Magnetic flux quantumQuantized unit of magnetic flux
- Magnetic hysteresisMagnetic hysteresis occurs when an external magnetic field is applied to a ferromagnet suc
- Magnetic momentConcept in the physics of electromagnetism
- Magnetic monopoleHypothetical particle with one magnetic pole
- Magnetic quantum numberNumber describing angular momentum along an axis
- Magnetic reluctanceResistance to magnetic flux
- Magnetic resonanceExcitation of a quantum system via magnetism
- Magnetic scalar potentialMagnetic analog of electric potential valid outside materials
- Magnetic semiconductorType of functional semiconducting oxide
- Magnetic structureOrdered arrangement of magnetic spins in a material
- Magnetic susceptibilityDegree to which a material becomes magnetized in an applied magnetic field
- Magnetic vector potentialQuantity in electromagnetism
- MagnetismClass of physical phenomena
- MagnetizationPhysical quantity, density of magnetic moment per volume
- Magnetocrystalline anisotropyIn physics, a ferromagnetic material is said to have magnetocrystalline anisotropy if it t
- MagnetohydrodynamicsModel of electrically conducting fluids
- MagnetometerDevice that measures magnetism
- Magnetomotive forceConcept in physics
- Magnetorheological fluidSmart fluid whose viscosity increases in a magnetic field
- MagnetostaticsBranch of physics about magnetism in systems with steady electric currents
- MagnificationProcess of enlarging the apparent size of something
- MagnonSpin 1 quasiparticle; quantum of a spin wave
- Magnus effectDeflection of a spinning object moving through a fluid
- Mainau DeclarationThe Mainau Declaration refers to any one of three socio-political appeals by Nobel laureat
- Majed CherguiSwiss and French physicist
- Majorana equationIn physics, the Majorana equation is a relativistic wave equation. It is named after the I
- Manfred von ArdenneGerman researcher and applied physicist (1907–1997)
- Manifest covarianceIn general relativity, a manifestly covariant equation is one in which all expressions are
- Many-body problemProblem in physics and quantum mechanics
- Many-worlds interpretationInterpretation of quantum mechanics
- Marcel BrillouinFrench physicist and mathematician (1854–1948
- Marco Durante (physicist)Italian physicist
- Mark AzbelSoviet and Israeli physicist (1932–2020)
- Mark Gross (mathematician)Mark William Gross FRS (born 30 November 1965) is an American mathematician, specializing
- Mark J. DevlinAmerican cosmologist
- MaroonReddish-brown color
- Martin DeutschAustrian-American physicist
- Martin RočekTheoretical physicist
- Mary L. BoasAmerican mathematician and physics professor
- Masaaki YamadaMasaaki Yamada (Japanese: 山田雅章, Hepburn: Yamada Masaaki, born August 9, 1942 in Japan) is
- MassAmount of matter present in an object
- Mass diffusivityProportionality constant in some physical laws
- Mass flow (life sciences)Movement of fluids down a pressure or temperature gradient
- Mass flow rateMass of a substance which passes per unit of time
- Mass fluxIn physics and engineering, mass flux is the rate of mass flow per unit of area. Its SI un
- Mass generationIn theoretical physics, a mass generation mechanism is a theory that describes the origin
- Mass in special relativityMeanings of mass in special relativity
- Mass versus weightDifference between mass and weight
- Mass-to-charge ratioPhysical quantity of interest in chemistry and electrodynamics
- Mass–energy equivalencePhysics concept expressed as E = mc²
- Massive gravityTheory of gravity in which the graviton has nonzero mass
- Massless particleParticle whose invariant mass is zero
- Material failure theoryScience of predicting if, when, and how a given material will fail under loading
- Material properties (thermodynamics)The thermodynamic properties of materials are intensive thermodynamic parameters which are
- Mathematical descriptions of the electromagnetic fieldFormulations of electromagnetism
- Mathematical formulation of quantum mechanicsMathematical structures that allow quantum mechanics to be explained
- Mathematical formulation of the Standard ModelMathematics of a particle physics model
- Mathematical physicsBranch of applied mathematics
- Mathematical universe hypothesisCosmological theory
- Mathematics of general relativityWhen studying and formulating Albert Einstein's theory of general relativity, various math
- Mathisson–Papapetrou–Dixon equationsGeneral relativity equation
- Matrix mechanicsFormulation of quantum mechanics
- Matrix string theoryIn physics, matrix string theory is a set of equations that describe superstring theory in
- MatterSomething that has mass and volume
- Matter waveQuantum mechanical waves describing matter
- Matthias StaudacherGerman theoretical physicist
- Maurice CouetteFrench physicist
- Maurice de Broglie, 6th Duke of BroglieFrench physicist (1875–1960)
- MauvePale purple colour
- Maxwell relationsPartial differential relations in thermodynamics
- Maxwell stress tensorElectromagnetic stress
- Maxwell–Boltzmann distributionSpecific probability distribution function, important in physics
- Maxwell–Boltzmann statisticsStatistical distribution used in many-particle mechanics
- Maxwell's demonThought experiment of 1867
- Maxwell's equationsEquations describing classical electromagnetism
- Maxwell's equations in curved spacetimeElectromagnetism in general relativity
- Maxwell's thermodynamic surfaceSculpture of a substance's thermodynamic properties
- Mayly SánchezVenezuelan scientist
- McDonald Ranch HouseThe McDonald Ranch House in the Oscura Mountains of Socorro County, New Mexico, was the lo
- McVittie metricSolution of Einstein field equations
- Mean free pathAverage distance travelled by a particle between impacts with other particles
- Mean inter-particle distanceMean inter-particle distance (or mean inter-particle separation) is the mean distance betw
- Mean-field theoryApproximation of physical behavior
- Measurement in quantum mechanicsInteraction of a quantum system with a classical observer
- Measurement problemTheoretical problem in quantum physics
- Mechanical advantageMeasure of the force amplification achieved by using a tool
- Mechanical equilibriumWhen the net force on a particle is zero
- Mechanical equivalent of heatConcept that motion and heat are interchangeable
- Mechanical resonanceTendency of a mechanical system
- Mechanical waveWave which is an oscillation of matter
- MechanicsScience concerned with physical bodies subjected to forces or displacements
- Meissner effectExpulsion of a magnetic field from a superconductor
- Melt blowingMelt blowing is a conventional fabrication method of micro- and nanofibers where a polymer
- MeltingMaterial phase change
- Melting pointTemperature at which a solid turns liquid
- Membrane foulingMembrane fouling is a process whereby a solution or a particle is deposited on a membrane
- Mercury (crystallography)Mercury is a freeware developed by the Cambridge Crystallographic Data Centre, originally
- Mercury-vapor lampLight source using an electric arc through mercury vapor
- MesocrystalA mesocrystal is a material structure composed of numerous small crystals of similar size
- MesogenA mesogen is a compound that displays liquid crystal properties. Mesogens can be described
- MesonSubatomic particle; made of equal numbers of quarks and antiquarks
- MesophaseIntermediate phase of matter between solid and liquid
- Mesoscopic physicsSubdiscipline of condensed matter physics
- Metacentric heightMeasurement of the initial static stability of a floating body
- Metal-halide lampA metal-halide lamp is an electrical lamp that produces light by an electric arc through a
- Metal-induced embrittlementEmbrittlement caused by diffusion of metal in a base metal
- Metal–semiconductor junctionType of electrical junction
- Metallic hydrogenPhase of hydrogen
- Metallization pressureAmount of pressure required for a non-metallic chemical element to become a metal
- MetamagnetismMetamagnetism is a sudden (often, dramatic) increase in the magnetization of a material wi
- MetamaterialMaterials engineered to have properties that have not yet been found in nature
- Metamaterial cloakingShielding an object from view using materials made to redirect light
- Metamerism (color)In colorimetry, metamerism is a perceived matching of colors with different (nonmatching)
- MetastabilityIntermediate energetic state within a dynamical system
- Method of virtual quantaThe method of virtual quanta is a method used to calculate radiation produced by interacti
- Metric tensor (general relativity)Tensor that describes the 4D geometry of spacetime
- Metric timeMeasure of time intervals using the metric system
- Michael Berry (physicist)British theoretical physicist (born 1941)
- Michael BonitzGerman theoretical physicist
- Michael CatesMichael Elmhirst Cates (born 5 May 1961) is a British physicist. He is the 19th Lucasian P
- Michael CreutzAmerican physicist (born 1944)
- Michael Duff (physicist)British physicist
- Michael Green (physicist)British physicist
- Michael Joseph OwensAmerican inventor
- Michael PeskinMichael Edward Peskin (born October 27, 1951, Philadelphia) is an American theoretical phy
- Michael R. DouglasAmerican theoretical physicist
- Michel Della NegraFrench physicist (born 1942)
- Michel DevoretFrench–American physicist (born 1953)
- Michelson interferometerCommon configuration for optical interferometry
- Michelson–Morley experiment1887 investigation of the speed of light
- MicroBooNEMicroBooNE is a liquid argon time projection chamber (LArTPC) at Fermilab in Batavia, Illi
- Microcanonical ensembleEnsemble of states with an exactly specified total energy
- MicrogramUnit of mass
- MicromechanicsMicromechanics (or, more precisely, micromechanics of materials) is the analysis of hetero
- Micrometer (device)Tool for the precise measurement of a component's length, width, and/or depth
- MicroquasarMiniature analogue of a quasar caused by black hole accretion
- Microstate (statistical mechanics)Specific microscopic configuration of a thermodynamic system
- MicrotechnologyMicrotechnology is technology whose features have dimensions of the order of one micrometr
- MicrowaveElectromagnetic radiation with wavelengths from 1 m to 1 mm
- Microwave engineeringStudy and design of microwaves
- Mie scatteringScattering of an electromagnetic plane wave by a sphere
- MillefioriGlasswork technique
- Miller indexNotation system for crystal lattice planes
- MillimetreUnit of length 1/1000 of a metre
- Mina AganagićMathematical physicist
- MINERνAMain Injector Experiment for ν-A, or MINERνA, is a neutrino scattering experiment which us
- MiniBooNEMiniBooNE is a Cherenkov detector experiment at Fermilab designed to observe neutrino osci
- Minimal subtraction schemeIn quantum field theory, the minimal subtraction scheme, or MS scheme, is a particular ren
- Minimal Supersymmetric Standard ModelSimplest supersymmetric extension to the Standard Model
- Minkowski spacetimeMathematical description of spacetime used in relativity
- MINOS+47°49′12″N 92°14′30″W / 47.82000°N 92.24167°W MINOS+ was a continuation of the MINOS exper
- Mirror imageReflected duplication of an object
- Mirror matterHypothetical counterpart to ordinary matter
- Mirror symmetry (string theory)In physics and geometry: conjectured relation between pairs of Calabi–Yau manifolds
- MisorientationDifference in orientation between two crystallites in a polycrystalline material
- Mixed nutsMixed nuts are a snack food consisting of any mixture of mechanically or manually combined
- Mm'-type filtermm'-type filters, also called double-m-derived filters, are a type of electronic filter de
- Modern physicsPhysics developed since 1900
- Moiré patternInterference pattern
- MoldaviteGreen natural glass possibly formed by a meteorite impact
- Molecular diffusionThermal motion of liquid or gas particles at temperatures above absolute zero
- Molecular dynamicsComputer simulations to discover and understand chemical properties
- Molecular orbitalWave-like behavior of an electron in a molecule
- Molecular orbital theoryMethod for describing the electronic structure of molecules using quantum mechanics
- Molecular physicsStudy of the physical and chemical properties of molecules
- Molecular Physics (journal)Molecular Physics is a peer-reviewed scientific journal covering research on the interface
- Molecular solidA molecular solid is a solid consisting of discrete molecules. The cohesive forces that bi
- Moment (physics)Product of a distance and physical quantity
- Moment of inertiaScalar measure of the rotational inertia with respect to a fixed axis of rotation
- MomentumProperty of a mass in motion
- Momentum operatorOperator in quantum mechanics
- Monatomic gasGas made of free atoms
- MonochromeComposed of one color
- Monoclinic crystal systemOne of the 7 crystal systems in crystallography
- Monstrous moonshineMonster and modular connection
- Monte Carlo method in statistical mechanicsMonte Carlo in statistical physics refers to the application of the Monte Carlo method to
- Moritz KellerhovenMoritz Kellerhoven (1758 - 15 December 1830) was a German portrait painter and etcher.
- MotionChange in the position of an object
- Mott insulatorElectrical insulators that are conventionally expected to be conductors
- Moving magnet and conductor problemThought experiment in physics
- MRI pulse sequencePulse sequence during a medical test
- Mu (letter)Twelfth letter of the Greek alphabet
- Muffin-tin approximationShape approximation
- Mullard AwardThe Mullard Award is awarded annually by the Royal Society to a person who has "an outstan
- Multi-configurational self-consistent fieldMethod in quantum chemistry
- Multicritical pointMulticritical points are special points in the parameter space of thermodynamic or other s
- Multiplicity (statistical mechanics)In statistical mechanics, multiplicity (also called statistical weight) refers to the numb
- Munsell color systemColor space
- MuonSubatomic particle
- Muon neutrinoSubatomic particle
- MuoniumType of atom
- MuranoSeries of islands in the Venetian Lagoon, Italy
- Musical acousticsMusical acoustics or music acoustics is a multidisciplinary field that combines knowledge
- Mustafa PrizeThe Mustafa Prize is a science and technology award, granted to top researchers and scient
- Myer BloomMyer Bloom, FRSC (7 December 1928 – 9 February 2016) was a Canadian physicist, specializin
