# 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:
 computational-physics× 243 Subdiscipline of theoretical physics which consists in the study of physics problems using numerical algorithms. PLEASE NOTE that questions about computational methods and/or programming are OFF-TOPIC… spring× 242 An object such as a metal coil or air-filled tube which provides a force opposing the direction of deformation. dimensions× 241 for dimensions of a manifold, typically the space-time. DO NOT USE THIS TAG for dimension of a physical quantity. rotation× 239 Circular motion about a central point or axis spectroscopy× 238 the practice of separating a signal by frequency (or sometimes energy or momentum) and analyzing the resulting spectrum. coordinate-systems× 238 quantify location in space. geometry× 237 To be used for questions on geometry closely pertaining to physics. Includes differential geometry and euclidean geometry. stars× 237 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… maxwell-equations× 236 The four fundamental fundamental equations of electromagnetism. lie-algebra× 236 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… notation× 232 ideal-gas× 232 A gas that behaves as randomly moving, non-interacting molecules. This allows a simplified equation of state. drag× 231 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. quantum-optics× 231 A research field within general optical physics concerned with light and its material interaction: where light is modelled by full quantum mechanical description. power× 231 The time rate of change of energy quantum-computer× 230 solar-system× 228 The Sun plus the collection of bodies in orbit around the Sun such as planets, dwarf planets, moons, asteroids, comets, etc. variational-principle× 228 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… polarization× 222 Polarization characterizes the oscillations in time the electromagnetic field is doing in the plane perpendicular to the propagation direction of a wave fermions× 221 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 … feynman-diagram× 218 integration× 218 representation-theory× 218 interference× 217 mass-energy× 216 neutrinos× 214 light, uncharged leptons. The neutrino tag should be applied to question relating to neutrino properties or interactions involving neutrinos. antimatter× 213 Analogous to matter, but with charge of the particles opposite to their ordinary matter counterparts. conventions× 212 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. hamiltonian× 209 The central term in the hamiltonian formalism. Can be interpreted as an energy input, or "true" energy. gauss-law× 209 A law in Classical Electromagnetism and Newtonian Gravity. phase-transition× 208 symmetry-breaking× 208 geometric-optics× 207 The subfield of optics in which light propagation is approximated in terms of rays. It mainly includes reflection and refraction on surfaces. diffraction× 205 commutator× 204 study the effect of applying two operators in succession. speed× 204 the magnitude of velocity.