Phase

Phase or phases may refer to:

In science

In physics

• Phase (matter), a physically distinctive form of a substance, such as the solid, liquid, and gaseous states of ordinary matter
  • Phase transition is the transformation of a thermodynamic system from one phase to another
• Phase (separation science)
  • Mobile phase and Stationary phase in chromatography
  • Aqueous phase and organic phase in liquid-liquid extraction
• Phase (waves), the initial angle of a sinusoidal function at its origin
• Polyphase system, a means of distributing alternating current electric power in multiple conducting wires with definite phase offsets
  • Single-phase electric power
  • Three-phase electric power
    • Three-phase, the mathematics of three-phase electric power
• Phase problem, the loss of information (the phase) from a physical measurement
• Phase factor, a complex scalar used in quantum mechanics
• Continuous Fourier transform, the angle of a complex coefficient representing the phase of one sinusoidal component
• Instantaneous phase, generalization for both cyclic and non-cyclic phenomena

In other sciences

• Archaeological phase, a discrete period of occupation at an archaeological site
• Lunar phase, the appearance of the Moon as viewed from the Earth
• Planetary phase, the appearance of the illuminated section of a planet
• In biology, a part of the cell cycle in which cells divide and reproduce
• Color phase, in biology, a group of individuals within a species with a particular coloration

In entertainment

• Phase (band), an alternative rock band
• "Phases", a box set of albums by The Who
• "Phases" (Buffy episode), an episode of the TV series Buffy the Vampire Slayer
• Phases (.hack), fictional monsters in the .hack franchise
• Phase IV, a 1974 science fiction movie directed by Saul Bass
• Phase, an incarnation of the DC Comics character usually known as Phantom Girl
• Phaze, an alternate world in Piers Anthony's Apprentice Adept series

Other uses

• Phase (syntax), a syntactic domain hypothesized by Noam Chomsky
• Phase 10, a card game created by Fundex Games
• Phase (video game), a 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

See also

• Phasing (disambiguation)
• Faze (disambiguation)
• Phaser (disambiguation)
• Phasor (disambiguation)
• FASOR (disambiguation)