# 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:
 double-slit-experiment× 114 probability× 114 power× 113 The time rate of change of energy quantum-optics× 113 A research field within general optical physics concerned with light and its material interaction: where light is modelled by full quantum mechanical description. resistance× 112 to electrical resistance. DO NOT USE THIS TAG for non-electrical resistance. group-representations× 112 atmosphere× 112 Gaseous layer around a planet, dwarf planet, or a star. speed× 111 the magnitude of velocity. stars× 110 path-integral× 110 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… refraction× 109 Change in the direction of propagation of a wave when its transmitting medium changes. rotation× 109 Circular motion about a central point or axis frequency× 108 the rate of repetitive aspect in the amplitude over a given dimension. curvature× 107 Use this for questions pertaining to curvature of manifolds. Does not need to be specific to general relativity, but also for curvature of e.g. a [tag:calabi-yau] manifold. antimatter× 107 neutrinos× 107 light, uncharged leptons. The neutrino tag should be applied to question relating to neutrino properties or interactions involving neutrinos. tensors× 107 geophysics× 106 physics of the Earth and its environment in space. Its subjects include the shape of the Earth, its gravitational and magnetic fields, the dynamics of the Earth as a whole and of its component parts, … galaxies× 106 Massive systems held together by gravitational attraction, consisting of stellar associations, star systems, star clusters and types of interstellar clouds, stellar remnants, gasses, cosmic dust and a… fermions× 106 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 … phase-transition× 105 notation× 103 moon× 102 A smaller body orbiting a larger, primary body, where the primary body is not a star. motion× 101 The change in position of an object relative to its frame of reference. metric-tensor× 101 The variables used in general relativity to describe the shape of spacetime. If your question is about metric units, use the tag "units", and/or "si-units" if it is about the SI system specifically. variational-principle× 101 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… maxwell-equations× 100 The four fundamental fundamental equations of electromagnetism. particles× 100 drag× 100 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. mass-energy× 99 hamiltonian× 98 The central term in the hamiltonian formalism. Can be interpreted as an energy input, or "true" energy. symmetry-breaking× 97 software× 96 ideal-gas× 96 A gas that behaves as randomly moving, non-interacting molecules. This allows a simplified equation of state. noethers-theorem× 96 A theorem that relates continuous symmetries (continuous transformations that don't affect the value of the lagrangian) to quantities conserved in time. integration× 95