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:
× 24
a system of units where certain dimensionful constants are set to 1. This often simplifies various formulae.
× 65
A transition by which the energy of at least one photon is completely transferred to a material.
× 512
The rate of change of velocity of a body per unit of time.
× 52
is appropriate for questions dealing with the physics of beams in accelerators (synchrotrons, cyclotrons, linacs, betatrons and other types of accelerators); the ways in which beams are generated; the…
× 2
× 597
the interdisciplinary science that deals with the study of all mechanical waves in gases, liquids, and solids including vibration, sound, ultrasound and infrasound. Applications of acoust…
× 170
the integral of the Lagrangian over time, or the integral of the Lagrangian Density over both time and space.
× 5
× 70
Thermodynamic processes that occur without exchanging heat between the system and its environment.
× 167
a special case of the holographic principle. It states that a quantum gravitating theory in Anti-de-Sitter (AdS) space is exactly equivalent to the gauge theory/Conformal Field Theory (CFT…
× 237
A subset of [tag:fluid-dynamics] concerning primarily forces such as lift and drag generated on bodies as they move through gasses or as gasses move through the body (typically air).
× 45
Aether(or ether) relates to the material which supposedly fills the entire universe. It is a concept used to understand action at a distance. Aether was described by Huygen as an "omnipresent, perfect…
× 2
× 234
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…
× 91
man-made vehicles intended to operate while flying through Earth's atmosphere.
× 11 × 32
× 6
related to scattering amplitudes.
× 24 × 5
× 688
The conserved quantity arising from a rotational invariance. Combine with rotational-dynamics for the classical mechanics approach and quantum-mechanics for the QM interpretation
× 116
The time derivative of angular position used when studying rotating objects or systems.
× 8 × 67
for anomalies in a symmetry, either in classical or quantum theories. This tag should **not** be used for anomalies in a measurement.
× 71 × 17 × 29
× 39
a spacetime with a constant negative Ricci Scalar.
× 199
Analogous to matter, but with charge of the particles opposite to their ordinary matter counterparts.
× 3
× 36
the generic name for the particles which interchange among other according to the representation(s) of the braid group.