Empty space
Encyclopedia
Empty space may refer to:
- Outer spaceOuter spaceOuter space is the void that exists between celestial bodies, including the Earth. It is not completely empty, but consists of a hard vacuum containing a low density of particles: predominantly a plasma of hydrogen and helium, as well as electromagnetic radiation, magnetic fields, and neutrinos....
, especially the relatively empty regions of the universe outside the atmospheres of celestial bodies - VacuumVacuumIn everyday usage, vacuum is a volume of space that is essentially empty of matter, such that its gaseous pressure is much less than atmospheric pressure. The word comes from the Latin term for "empty". A perfect vacuum would be one with no particles in it at all, which is impossible to achieve in...
, a volume of space that is essentially empty of matter, such that its gaseous pressure is much less than atmospheric pressure - Free space, a perfect vacuum as expressed in the classical physics model
- Vacuum stateVacuum stateIn quantum field theory, the vacuum state is the quantum state with the lowest possible energy. Generally, it contains no physical particles...
, a perfect vacuum based on the quantum mechanical model - In mathematical physicsMathematical physicsMathematical physics refers to development of mathematical methods for application to problems in physics. The Journal of Mathematical Physics defines this area as: "the application of mathematics to problems in physics and the development of mathematical methods suitable for such applications and...
, the homogeneous equation may correspond to a physical theory formulated in empty space - "Empty Space", a song by British band Air TrafficAir TrafficAir Traffic was a British alternative rock band from Bournemouth. Formed in 2003, the band consists of Chris Wall , David Ryan Jordan , Tom Pritchard and Jim Maddock ....