Empty space
From Wikipedia, the free encyclopedia
Empty space may refer to:
- Outer space, especially the relatively empty regions of the universe outside the atmospheres of celestial bodies
- Vacuum, 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 state, a perfect vacuum based on the quantum mechanical model
- In mathematical physics, the homogeneous equation may correspond to a physical theory formulated in empty space.
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