Phase

Phase ( ancient Greek φασις emphasis or "appearance" ) may refer to:

In the theory of oscillations, the current position in the sequence of a recurring task, see phase angle
In the wave theory of section within a wave, see wave # phase
The relative displacement between two signals, phase shift, see
In astronomy, the shape of a non- self-luminous celestial body, see day - night boundary
In mathematics and engineering the angle of two pointers, see phasor diagram
In physical chemistry, thermodynamics, and materials science a homogeneous region with the same physical and chemical properties, see Phase (matter) between two phases, there is a distribution equilibrium, application in the extraction
In chromatography, a distinction between the stationary and mobile phase