A phase diagram or phase space is a useful construct used in mathematics and physics to demonstrate and visualise the changes in a given system. Every degree of freedom or parameter of the system is represented as an axis of a multidimensional space. Time is not considered to be one of the dimensions but rather is allowed to flow letting the system (which is represented as a single point moving through the phase space) evolve. A phase space may contain very many dimensions, For instance a gas containing many molecules may require a separate dimension for each particle's x, y and z positions and velocities as well as any number of other properties.
All Wikipedia text
is available under the
terms of the GNU Free Documentation License
Search over one million articles, find something about almost anything!