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4 Answers. Sorted by: 11. As zonk said, there is no perfect vacuum. Even the 'vacuum' of space contains a few atoms per cubic meter on average. In the lab, the lack of a high vacuum usually results from not having a pump that can effectively extract enough of the particles inside the chamber you're trying to evacuate.
- As zonk said, there is no perfect vacuum. Even the 'vacuum' of space contains a few atoms per cubic meter on average. In the lab, the lack of a hi...
- The current record vacuum, made at CERN, is around 1000atoms/cubic cm For comparison intersteller space (well away from the solar system) is around...
- I'd like to add another dimension to this discussion. Even if we were to hypothetically evacuate all atoms from a certain region of space, quantum...
- It is really really really difficult to get a vacuum of 1E-10 Pa at room temperature when surrounded by a 1E+5 Pa atmosphere (sea level on Earth)....
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- How A Vacuum Works
- Why A Perfect Vacuum Is Impossible
- How Close to A Perfect Vacuum Can You get?
- References
In order to understand why a perfect vacuum isn’t possible, it’s helpful to understand how a vacuum works. By definition, a vacuum is a volume that contains little or no matter. Any region with fewer particles than air at atmospheric pressure is a vacuum. Familiar examples of (imperfect) vacuums include vacuum cleaner suction, the interior of an in...
Forming a perfect vacuum is impossible because no device removes every single atom or molecules from a space, we can’t expand a volume infinitely, and we can’t prevent all outside particles from getting inside a container. Researchers achieve near-perfect vacuums using multiple vacuum pumps. But, there are other considerations, too. As pressure fal...
In nature, the closest you can get to a perfect vacuum is intergalactic space. There is still residual radiation and the odd atom, ion, and subatomic particle. Vacuum fluctuation still occurs. But, there are around 10-6particles per cubic meter of space. Another way to look at it is that if you examine a random cubic meter of intergalactic space, c...
Beckwith, Thomas G.; Marangoni, Roy D.; Lienhard, John H.(1993). “Measurement of Low Pressures”. Mechanical Measurements(5th ed.). Reading, Massachusetts: Addison-Wesley. ISBN 978-0-201-56947-6.Chambers, Austin (2004). Modern Vacuum Physics. Boca Raton: CRC Press. ISBN 978-0-8493-2438-3.Genz, Henning (2001). Nothingness: The Science Of Empty Space. Da Capo Press. ISBN 978-0-7382-0610-3.Ishimaru, H (1989). “Ultimate Pressure of the Order of 10−13 torr in an Aluminum Alloy Vacuum Chamber”. Journal of Vacuum Science and Technology. 7 (3–II): 2439–2442. doi:10.1116/1.575916Apr 13, 2017 · A perfect vacuum is defined as a state with no matter particles, and also no photons. This state is impossible to achieve experimentally because it is nearly impossible to remove the matter, and is impossible to eliminate all the photons. Since there is also some energy available, virtual particles can hop into and out of existence.
- What you're describing is theoretically possible, or at least there is no contradiction inherent in its conception any more than any other "pure" q...
- A perfect vacuum would be empty space with no atoms or any particles in it. But there is no such thing because virtual particles are always popping...
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