K
- K-theory (physics)Application of K-theory in string theory
- Kalb–Ramond fieldIn theoretical physics in general and string theory in particular, the Kalb–Ramond field (
- Kaluza–Klein theoryUnified field theory
- KaonQuantum particle
- KappaTenth letter in the Greek Alphabet
- Karl BechertGerman physicist (1901–1981)
- Karl P. CohenAmerican physical chemist
- Karl-Heinz HöckerKarl-Heinz Höcker (27 December 1915 – 17 July 1998) was a German theoretical nuclear physi
- Kasner metricSolution of Einstein field equations
- Keith Bullen (mathematician)Australian mathematician and geophysicist
- Keith BurrellAmerican plasma physicist
- Keith MoffattHenry Keith Moffatt, FRS FRSE (born 12 April 1935) is a British mathematician with researc
- Keith StewartsonKeith Stewartson (20 September 1925 – 7 May 1983) was an English mathematician and fellow
- Kelvin's circulation theoremTheorem regarding circulation in a barotropic ideal fluid
- Kenneth Stewart ColeAmerican biophysicist (1900–1984)
- Kepler problemSpecial case of the two-body problem
- Kermes (dye)Red dye derived from scale insects in genus Kermes
- Kerosene lampType of lighting device that uses kerosene as a fuel
- Kerr metricExact solution for the Einstein field equations
- Kerr–Newman metricSolution of Einstein field equations
- Kerr–Newman–de–Sitter metricSolution of Einstein field equations
- Kerr/CFT correspondenceThe Kerr/CFT correspondence is an extension of the AdS/CFT correspondence or gauge-gravity
- Kevin CostelloIrish mathematician
- Kimberly S. BudilAmerican physicist
- KinematicsBranch of physics describing the motion of objects without considering forces
- Kinetic energyEnergy of a moving physical body
- Kinetic theory of gasesUnderstanding of gas properties in terms of molecular motion
- Kinetics (physics)Subfield of physics
- Kirchhoff's circuit lawsTwo equalities that deal with the current and potential difference
- KitchenwareItems used for preparing, storing and serving food
- Klaus FredenhagenKlaus Fredenhagen (born 1 December 1947) is a German theoretical physicist who works on th
- Klein–Gordon equationRelativistic wave equation in quantum mechanics
- Knight shiftThe Knight shift is a shift in the nuclear magnetic resonance (NMR) frequency of a paramag
- Kohn–Sham equationsThe Kohn-Sham equations are a set of mathematical equations used in quantum mechanics to s
- Kondo effectPhysical phenomenon due to impurities
- Koopman–von Neumann classical mechanicsFormulation of classical mechanics in terms of Hilbert spaces
- Korringa–Kohn–Rostoker methodThe Korringa–Kohn–Rostoker (KKR) method is used to calculate the electronic band structure
- Kounotori 5Kounotori 5, also known as HTV-5, was the fifth flight of the H-II Transfer Vehicle, an un
- Kramers–Kronig relationsType of mathematical relation
- Krasnikov tubeA Krasnikov tube is a speculative mechanism for space travel involving the warping of spac
- Kristian BirkelandNorwegian scientist (1867–1917)
- Kurchatov InstituteRussian nuclear energy research and development laboratory
- Kyropoulos methodMethod of bulk crystal growth used to obtain single crystals