Phase or phases may refer to:
Science
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State of matter, or phase, one of the distinct forms in which matter can exist
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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, magnetiza ...
, a region of space throughout which all physical properties are essentially uniform
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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 usually ...
, 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"
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Phase space formulation, a formulation of quantum mechanics in phase space
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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 v ...
, the position of a point in time (an instant) on a waveform cycle
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Instantaneous phase, generalization for both cyclic and non-cyclic phenomena
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AC phase, the phase offset between alternating current electric power in multiple conducting wires
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Single-phase electric power
In electrical engineering, single-phase electric power (abbreviated 1φ) is the distribution of alternating current electric power using a system in which all the voltages of the supply vary in unison. Single-phase distribution is used when load ...
, distribution of AC electric power in a system where the voltages of the supply vary in unison
**
Three-phase electric power
Three-phase electric power (abbreviated 3φ) is a common type of alternating current used in electricity generation, transmission, and distribution. It is a type of polyphase system employing three wires (or four including an optional neutral ...
, a common method of AC electric power generation, transmission, and distribution
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Phase problem, the loss of information (the phase) from a physical measurement
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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
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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 representat ...
, a discrete period of occupation at an archaeological site
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Color phase, in biology, a group of individuals within a species with a particular coloration
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Gametic phase, in genetics, the relationship between alleles at two chromosomal loci
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Lunar phase
Concerning the lunar month of ~29.53 days as viewed from Earth, the lunar phase or Moon phase is the shape of the Moon's directly sunlit portion, which can be expressed quantitatively using areas or angles, or described qualitatively using the t ...
, the appearance of the Moon as viewed from the Earth
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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 ...
, the appearance of the illuminated section of a planet
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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 n ...
, in physical chemistry, the separation of a liquid mixture into two immiscible liquids above and below a meniscus
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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
In cell biology, mitosis () is a part of the cell cycle in which replicated chromosomes are separated into two new nuclei. Cell division by mitosis gives rise to genetically identical cells in which the total number of chromosomes is mainta ...
) 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 resu ...
)
Music
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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 Vasili ...
, a Greek alternative rock band
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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 Planet ...
, an indie pop American band, formerly known as JJAMZ
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''Phase'' (album), a debut studio album by an English singer Jack Garratt
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''Phases'' (The Who album), a box set of albums by The Who
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''Phases'' (I See Stars album), 2015
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''Phase'' (Mildlife album), a 2017 album by Mildlife
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''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 cau ...
''
Other entertainment
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"Phases" (''Buffy the Vampire Slayer''), a 1998 episode of the TV series ''Buffy the Vampire Slayer''
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Phases (.hack)
''.hack'' comprises ''"Project .hack"'' and "''.hack Conglomerate".'' It is a Japanese multimedia franchise primarily developed by CyberConnect2 and published by Bandai. The franchise is set on an Earth with an alternate history. In this timelin ...
, fictional monsters in the .hack franchise
*Phase, an incarnation of the DC Comics character usually known as
Phantom Girl
Other uses
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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
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''Phase'' (video game), a 2007 music game for the iPod developed by Harmonix Music Systems
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Phase (combat), usually a period of combat within a larger military operation
*A musical composition using Steve Reich's
phasing technique
See also
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Phase 1 (disambiguation) Phase 1, Phase I or Phase One may refer to:
Media
* Marvel Cinematic Universe: Phase One, six American superhero films from 2008–2012
* ''Phase One'' (Art Ensemble of Chicago album), 1971
* ''Phase One'' (Saga album), 1998
* ''Phase One'', r ...
*
Phase 2 (disambiguation)
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Phase 3 (disambiguation) Phase 3, Phase III or Phase Three may refer to:
Media
* Marvel Cinematic Universe: Phase Three, eleven American superhero films from 2016–2019
* '' Phase 3: Thrones and Dominions'', a 1995 album by Earth
* ''Phase III'' (album), a 1972 album ...
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Phase 4 (disambiguation) Phase 4, Phase IV or Phase Four may refer to:
Media
* Marvel Cinematic Universe: Phase Four, a group of superhero films and television series beginning in 2021
* ''Phase IV'' (1974 film), a 1974 film
* ''Phase IV'' (2002 film), a 2002 film
* ...
*
Phase 5 (disambiguation) Phase 5, Phase V or Phase Five may refer to:
* Marvel Cinematic Universe: Phase Five, an in-development group of superhero films and television series
* Phase5, a hardware manufacturer for the Amiga computer
* Deployment phase 5, a final deploymen ...
*
Phase space (disambiguation) 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 s ...
*
Phaser (disambiguation)
Phaser may refer to:
* Raytheon Phaser, a directed-energy weapon
* Phaser (fictional weapon), a gun in the ''Star Trek'' universe
* Phaser (effect), in electronics, an audio signal processor used to distort the signal
* Light Phaser, a lightgun for ...
*
Phasing (disambiguation) Phasing may refer to:
*Phasing, a technique in musical composition
* Phasing, the use of the Phaser (effect), an audio signal processing technique
Science
* Phase-out of chlorofluorocarbon
*Phase-out of incandescent light bulbs
*Fossil fuel phase ...
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Phasor (disambiguation)
* Phaze, a fictional world in Piers Anthony's ''
Apprentice Adept
''Apprentice Adept'' is a heptalogy of fantasy and science fiction novels written by English American author Piers Anthony. The series takes place on ''Phaze'' and ''Proton'', two worlds occupying the same space in two different dimensional planes ...
'' series
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Faze (disambiguation)
FaZe Clan (formerly FaZe Sniping) is a professional esports and entertainment organization headquartered in Los Angeles, California, USA. Founded on May 30, 2010, the organization has players from around the world, across multiple games, includ ...
*
FASOR (disambiguation)
Fasor or FASOR may refer to:
* Frequency addition source of optical radiation
* Forward Air Spring Operated Return, a part of a paintball gun
See also:
*Phase (disambiguation)
*Phaser (disambiguation)
*Phasor (disambiguation)
Phasor is a phase ...
*
Stage (disambiguation)
Stage or stages may refer to:
Acting
* Stage (theatre), a space for the performance of theatrical productions
* Theatre, a branch of the performing arts, often referred to as "the stage"
* ''The Stage'', a weekly British theatre newspaper
* Sta ...
{{disambiguation