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State of matter. In physics, a state of matter is one of the distinct forms in which matter can exist. Four states of matter are observable in everyday life: solid, liquid, gas, and plasma. Many intermediate states are known to exist, such as liquid crystal, and some states only exist under extreme conditions, such as Bose–Einstein ...
A degenerate mass whose fermions have velocities close to the speed of light (particle kinetic energy larger than its rest mass energy) is called relativistic degenerate matter. The concept of degenerate stars , stellar objects composed of degenerate matter, was originally developed in a joint effort between Arthur Eddington , Ralph Fowler and ...
List of states of matter. Matter organizes into various phases or states of matter depending on its constituents and external factors like pressure and temperature. In common temperatures and pressures, atoms form the three classical states of matter: solid, liquid and gas. Complex molecules can also form various mesophases such as liquid ...
For other uses, see Matter (disambiguation). Hydrogen in its plasma state is the most abundant ordinary matter in the universe. In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume. [ 1 ] All everyday objects that can be touched are ultimately composed of atoms, which are made up ...
Category. v. t. e. Illustration of Bose-Einstein condensation: as the temperature of the ensemble of bosons is reduced, the overlap between the particles' wavefunctions increases as the thermal de Broglie wavelength increases. At one point, when the overlap becomes significant, a macroscopic number of particles condense into the ground state.
Image of Sirius A and Sirius B taken by the Hubble Space Telescope. Sirius B, which is a white dwarf, can be seen as a faint point of light to the lower left of the much brighter Sirius A. A white dwarf is a stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very dense: its mass is comparable to the Sun 's ...
In quantum mechanics, an energy level is degenerate if it corresponds to two or more different measurable states of a quantum system. Conversely, two or more different states of a quantum mechanical system are said to be degenerate if they give the same value of energy upon measurement. The number of different states corresponding to a ...
Liquid crystal (LC) is a state of matter whose properties are between those of conventional liquids and those of solid crystals. For example, a liquid crystal can flow like a liquid, but its molecules may be oriented in a common direction as in a solid. There are many types of LC phases, which can be distinguished by their optical properties ...