Phase or phases may refer to:

Science

* State of matter, or phase, one of the distinct forms in which matter can exist *

Phase (matter) In the physical sciences, a phase is a region of space (a thermodynamic system), throughout which all physical properties of a material are essentially uniform. Examples of physical properties include density, index of refraction, magnet ...

, a region of space throughout which all physical properties are essentially uniform *

Phase space In dynamical system theory, a phase space is a space in which all possible states of a system are represented, with each possible state corresponding to one unique point in the phase space. For mechanical systems, the phase space usuall ...

, a mathematical space in which each possible state of a physical system is represented by a point — this equilibrium point is also referred to as a "microscopic state" ** Phase space formulation, a formulation of quantum mechanics in phase space *

Phase (waves) In physics and mathematics, the phase of a periodic function F of some real variable t (such as time) is an angle-like quantity representing the fraction of the cycle covered up to t. It is denoted \phi(t) and expressed in such a scale that it ...

, the position of a point in time (an instant) on a waveform cycle ** Instantaneous phase, generalization for both cyclic and non-cyclic phenomena * AC phase, the phase offset between alternating current electric power in multiple conducting wires ** Single-phase electric power, distribution of AC electric power in a system where the voltages of the supply vary in unison ** Three-phase electric power, a common method of AC electric power generation, transmission, and distribution * Phase problem, the loss of information (the phase) from a physical measurement * Phase factor, a complex scalar used in quantum mechanics *in continuous Fourier transform, the angle of a complex coefficient representing the phase of one sinusoidal component

Other sciences

Archaeological phase In archaeology, a phase refers to the logical reduction of contexts recorded during excavation to nearly contemporary archaeological horizons that represent a distinct "phase" of previous land use. These often but not always will be a representa ...

, a discrete period of occupation at an archaeological site * Color phase, in biology, a group of individuals within a species with a particular coloration * Gametic phase, in genetics, the relationship between alleles at two chromosomal loci * Lunar phase, the appearance of the Moon as viewed from the Earth *

Planetary phase A planetary phase is a certain portion of a planet's area that reflects sunlight as viewed from a given vantage point, as well as the period of time during which it occurs. Inferior planets The two inferior planets, Mercury and Venus, which h ...

, the appearance of the illuminated section of a planet *

Phase separation Phase separation is the creation of two distinct phases from a single homogeneous mixture. The most common type of phase separation is between two immiscible liquids, such as oil and water. Colloids are formed by phase separation, though no ...

, in physical chemistry, the separation of a liquid mixture into two immiscible liquids above and below a meniscus *

Phase (syntax) In linguistics, the minimalist program is a major line of inquiry that has been developing inside generative grammar since the early 1990s, starting with a 1993 paper by Noam Chomsky. Following Imre Lakatos's distinction, Chomsky presents minima ...

, in linguistics, a cyclic domain (proposed by Noam Chomsky) *In biology, a part of the cell cycle in which cells divide ( mitosis) and/or reproduce (

meiosis Meiosis (; , since it is a reductional division) is a special type of cell division of germ cells in sexually-reproducing organisms that produces the gametes, such as sperm or egg cells. It involves two rounds of division that ultimately ...

)

Music

Phase (band) Phase is a UK-based rock band formed in Larissa, Greece in 2003. It was founded by Thanos Grigoriou, who was performing and recording with various members until the line-up was completed in 2011, with the addition of Damos Harharidis and Vasil ...

, a Greek alternative rock band *

Phases (band) Phases (formerly known as JJAMZ and pronounced ''juh-jamz'') is an American indie pop band from Los Angeles, California composed of Jason Boesel ( Rilo Kiley / Bright Eyes/ Conor Oberst and the Mystic Valley Band), Alex Greenwald (Phantom Pl ...

, an indie pop American band, formerly known as JJAMZ * ''Phase'' (album), a debut studio album by an English singer Jack Garratt * ''Phases'' (The Who album), a box set of albums by The Who * ''Phases'' (I See Stars album), 2015 * ''Phase'' (Mildlife album), a 2017 album by Mildlife * ''Phases'' (Angel Olsen album), 2017 *"Phases", a song by English alternative rock band Keane from their 2019 album ''

Cause and Effect Causality (also referred to as causation, or cause and effect) is influence by which one event, process, state, or object (''a'' ''cause'') contributes to the production of another event, process, state, or object (an ''effect'') where the ca ...

Other entertainment

* "Phases" (''Buffy the Vampire Slayer''), a 1998 episode of the TV series ''Buffy the Vampire Slayer'' * Phases (.hack), fictional monsters in the .hack franchise *Phase, an incarnation of the DC Comics character usually known as Phantom Girl

Other uses

Phase 10 Phase 10 is a card game created in 1982 by Kenneth Johnson and sold by Mattel, which purchased the rights from Fundex Games in 2010. Phase 10 is based on a variant of rummy known as contract rummy. It consists of a special deck equivalent to ...

, a card game created by Fundex Games * ''Phase'' (video game), a 2007 music game for the iPod developed by Harmonix Music Systems * Phase (combat), usually a period of combat within a larger military operation *A musical composition using Steve Reich's phasing technique

Science

Other sciences

Music

Other entertainment

Other uses

See also