# Tags

A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

 Type to find tags:
 coordinate-systems× 266 quantify location in space. lie-algebra× 265 A vector space $\mathfrak{g}$ over some field $F$ and kitted with a bilinear, antisymmetric and Jacobi-identity-fulfilling product ("Lie Bracket" or "commutator"). In physics, most often arises as the… dark-matter× 264 Matter not observed directly but inferred to exist based upon its gravitational effects spectroscopy× 263 the practice of separating a signal by frequency (or sometimes energy or momentum) and analyzing the resulting spectrum. spring× 263 An object such as a metal coil or air-filled tube which provides a force opposing the direction of deformation. path-integral× 263 Path integral formulation (Due to Feynman) is a major formulation of Quantum Mechanics along with Matrix mechanics (Due to Heisenberg and Pauli), Wave Mechanics (Due to Schrodinger), and Variational M… air× 262 a layer of gases that surround it, permitting life and protecting life by absorbing ultraviolet solar radiation, warming the surface by retaining the heat and mitigating the temp… ideal-gas× 261 A gas that behaves as randomly moving, non-interacting molecules. This allows a simplified equation of state. variational-principle× 261 any of several principles that find the physical trajectory of a system by minimizing or maximizing some value computed over the proposed path (for instance geometric optics can be reproduced by insis… stars× 259 astronomical bodies that are (usually) mainly composed of Hydrogen, Helium, and Lithium. They are massive enough that their gravity compresses the matter to the point where nuclear fusion oc… geometry× 259 To be used for questions on geometry closely pertaining to physics. Includes differential geometry and euclidean geometry. dimensions× 258 for dimensions of a manifold, typically the space-time. DO NOT USE THIS TAG for dimension of a physical quantity. polarization× 257 Polarization characterizes the oscillations in time the electromagnetic field is doing in the plane perpendicular to the propagation direction of a wave rotation× 257 Circular motion about a central point or axis quantum-computer× 254 notation× 254 power× 253 The time rate of change of energy drag× 252 The force on a body resulting from it's motion through a fluid (gas or liquid). This force is directly opposed to the direction of travel. conventions× 251 a set of agreed, stipulated, or generally accepted norms. It typically helps common efficiency or understanding but is not required, as opposed to a strict standard or protocol. fermions× 246 particles with an intrinsic angular momentum (i.e. spin) equal to a "half integer" number of fundamental units: $\frac{(2n+1)}{2} \hbar$ for integer $n$. Fermions are required to be in a … quantum-optics× 245 A research field within general optical physics concerned with light and its material interaction: where light is modelled by full quantum mechanical description. solar-system× 245 The Sun plus the collection of bodies in orbit around the Sun such as planets, dwarf planets, moons, asteroids, comets, etc. gauss-law× 243 A law in Classical Electromagnetism and Newtonian Gravity. interference× 242 mass-energy× 242 feynman-diagram× 242 antimatter× 237 Analogous to matter, but with charge of the particles opposite to their ordinary matter counterparts. speed× 236 the magnitude of velocity. representation-theory× 235 phase-transition× 235 integration× 235 geometric-optics× 234 The subfield of optics in which light propagation is approximated in terms of rays. It mainly includes reflection and refraction on surfaces. symmetry-breaking× 232 hamiltonian× 229 The central term in the hamiltonian formalism. Can be interpreted as an energy input, or "true" energy. rotational-kinematics× 228 A tag for questions about rotational motion, including angular velocity and angular acceleration. neutrinos× 227 light, uncharged leptons. The neutrino tag should be applied to question relating to neutrino properties or interactions involving neutrinos.