Phase

Phase or phases may refer to:

==Science== State of matter, or phase, one of the distinct forms in which matter can exist Phase (matter), a region of space throughout which all physical properties are essentially uniform Phase space, a mathematical space in which each possible state of a physical system is represented by a point also referred to as a "microscopic state" Phase space formulation, a formulation of quantum mechanics in phase space Phase (waves), 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 The argument or angle of complex numbers is sometimes called the phase