The index of physics articles is split into multiple pages due to its size.
To navigate by individual letter use the table of contents below.
U
U-duality U.S. Standard Atmosphere UA1 experiment UA2 experiment UC Santa Barbara Physics Department UK Dark Matter Collaboration UMER UMIST linear system UNIT OF REFRIGERATION UPTI Affair USAF Stability and Control DATCOM UV completion UV fixed point Über die von der molekularkinetischen Theorie der Wärme geforderte Bewegung von in ruhenden Flüssigkeiten suspendierten Teilchen Über quantentheoretische Umdeutung kinematischer und mechanischer Beziehungen Udipi Ramachandra Rao Ugo Fano Ukichiro Nakaya Ulf Leonhardt Ultimate fate of the universe Ultra-high-energy cosmic ray Ultra-low frequency Ultra high frequency Ultrafast x-rays Ultrahigh energy gamma-ray Ultralight trike Ultraluminous X-ray source Ultramicroscope Ultrarelativistic limit Ultrashort pulse Ultrasoft radiation Ultrasonic flow meter Ultrasonic foil (papermaking) Ultrasonic force microscopy Ultrasonic hearing Ultrasonic horn Ultrasonic nozzle Ultrasonic sensor Ultrasonic testing Ultrasonic welding Ultrasonics Ultrasound Ultrasound-enhanced systemic thrombolysis Ultrasound attenuation spectroscopy Ultraviolet Ultraviolet catastrophe Ultraviolet divergence Umklapp scattering Unbiennium Uncertainty Uncertainty principle Unconventional wind turbines Undercompressive shock wave Understanding Physics Undertow (wave action) Underwater acoustic communication Underwater acoustic positioning system Underwater acoustics Underwater telephone Undulation of the geoid Undulator Undulatory theory of light Unequal rotor lift distribution Uniaxial crystal Unified field theory Uniform acceleration Uniform circular motion Uniform motion Uniform theory of diffraction Uniqueness theorem for Poisson's equation Unit commensurability Unit of length Unitarity (physics) Unitarity bound Unitarity gauge Unitary Plan Wind Tunnel United States Air Force Stability and Control Digital DATCOM United States Invitational Young Physicists Tournament United States National Physics Olympiad Units of measurement Universal conductance fluctuations Universal extra dimension Universal force field Universal linear accelerator Universal quantum simulator Universal wave function Universality (dynamical systems) Universe Unparticle physics Unrestricted Hartree–Fock Unruh effect Unruh temperature Unsepttrium Unsolved problems in astronomy Untriseptium Up quark Upper-atmospheric lightning Upper-convected Maxwell model Upper-convected time derivative Upper critical solution temperature Upper hybrid oscillation Upper tangent arc Upsilon meson Upward continuation Upward looking sonar Upwind scheme Uranium Uranium boride Uranium carbide Uranium dioxide Uranium hydride bomb Uranium in the environment Uranium pentafluoride Uranium tetrachloride Uranium tetrafluoride Uranyl carbonate Uranyl nitrate Uranyl peroxide Urca process Uriel Frisch Ursell number Ursula Franklin Uspekhi Fizicheskikh Nauk Ussing chamber Uzi Landman