# 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:
 voltage× 460 the unit of measurement for electronic potential, from one point location to another. measurement× 453 The result of sampling the property of a system torque× 451 The tendency of a force to rotate an object about an arbitrary axis. conformal-field-theory× 450 a quantum field theory that is invariant under conformal transformations. In 2D, the infinite-dimensional algebra of local conformal transformations normally permits … superconductivity× 449 the transmission of current with no resistive losses, and is one of the most active areas of condensed matter physics research. refraction× 442 Change in the direction of propagation of a wave when its transmitting medium changes. units× 437 standards of measurement used for different types of quantities. double-slit-experiment× 432 The double slit experiment involves passing light through two parallel slits to demonstrate that the light from one slit interferes with that from the other. classical-electrodynamics× 427 frequency× 412 the rate of repetitive aspect in the amplitude over a given dimension. computational-physics× 411 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… thermal-radiation× 410 The temperature-dependant emission of electromagnetic waves. Combine this tag with [tag:thermodynamics] for a macroscopic view or [tag:quantum-mechanics] for a microscopic explanation. quantum-interpretations× 409 for questions relating to what, if anything, the quantum mechanical formalism and experimental results say about the way the world works. gravitational-waves× 408 curvature× 407 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. atoms× 406 A nucleus made of protons and neutrons surrounded by a cloud of electrons equal in number to the protons. vacuum× 402 A region of space devoid of any fluid molecules resulting in a zero pressure in ideal cases. In practice, even space has a small but finite number of molecules. In QFT, it signifies the ground state d… history× 401 The historical development of physics concepts: who did what and when. atmospheric-science× 399 The study of the composition or dynamics of the gaseous layers around planets, often applied to questions on Earth's atmosphere but can be applicable to all planets & moons in the solar system. fourier-transform× 395 A unitary linear operator which resolves a function on $\mathbb{R}^N$ into a linear superposition of "plane wave functions". Most often used in physics for calcalating the response of a time shift inv… planets× 390 Celestial body that orbits following an elliptical path around a star or stellar remnant. measurement-problem× 389 for questions about the quantum mechanical measurement problem, such as e.g. the wavefunction collapse/decoherence. DO NOT USE THIS TAG for non-quantum measurements. probability× 387 For questions about probability, probability theory, probability distributions, expected values and related matters. Purely mathematical questions should be asked on Math.SE. ideal-gas× 379 A gas that behaves as randomly moving, non-interacting molecules. This allows a simplified equation of state. faster-than-light× 378 "Faster-than-light", also known as superluminal velocities, refers to any sort of travel at a speed greater than the speed of light. Prohibited in mainstream physics due to the Special theory of … interference× 377 Interference describes different waves superposing to form a resultant wave of greater, lower, or the same amplitude. Normally, it involves interaction of waves that are correlated (coherent) with eac… rotation× 376 Circular motion about a central point or axis spring× 375 An object such as a metal coil or air-filled tube which provides a force opposing the direction of deformation. definition× 374 is used in situations where the question is either about how some term or concept is defined or where the validity of an answer depends on a subtle definition of some term or concep… conventions× 373 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. physical-chemistry× 373 Study of macroscopic and microscopic phenomena in chemical systems in terms of physical laws and concepts [thermodynamics, statistical mechanics, kinetic theory, quantum mechanics...]. maxwell-equations× 369 The four fundamental fundamental equations of electromagnetism. coordinate-systems× 367 quantify location in space. tensor-calculus× 365 a systematic extension of vector calculus to multivector and tensor fields in a form that is independent of the choice of coordinates on the relevant manifold, but… inertial-frames× 363 A specific reference frame that describes its coordinates in a manner that does not depend on time and is isotropic. gauss-law× 362 A law in Classical Electromagnetism and Newtonian Gravity.