Vacuum chamber vacuum refers to the given space of gas below atmospheric pressure. Vacuum is relative to atmospheric pressure, not that there is no matter in the space
Vacuum is a concept in physics, which begins to reflect the state of emptiness. That is, vacuum is not nothing, but the transformation of physical particles and virtual particles, but the overall external is a macro total that does not show physical properties. Vacuum is like an energy sea, constantly oscillating and full of huge energy
It is true that the property of vacuum needs to be described by space, but it is only a mathematical expression. It is a parameter introduced for the convenience of research. It does not mean that the nature of vacuum depends on space
Vacuum chamber is a technology which is built under the environment of lower atmospheric pressure and is needed for technological production, scientific experiment and physical measurement in this environment
At very low pressures obtained by modern pumping methods, there are still hundreds of molecules per cubic centimeter of space
The rarefied degree of gas is an objective measure of vacuum. The direct physical measure is the number of gas molecules in unit volume. The smaller the gas molecular density is, the lower the gas pressure is, the higher the vacuum is. Vacuum is usually used as the pressure unit of Pascal or Torr
Vacuum technology mainly includes four aspects: vacuum acquisition, vacuum measurement, vacuum leak detection and vacuum application
With the development of vacuum acquisition technology, the application of vacuum has been extended to all aspects of industry and scientific research. Vacuum application refers to the use of the physical environment of rarefied gas to complete certain specific tasks. Some use this environment to manufacture products or equipment, such as light bulbs, electronic tubes and accelerators. These products always maintain vacuum during use, Others only regard vacuum as a step in production. Products are used in atmospheric environment, such as vacuum coating, vacuum drying and vacuum impregnation
Vacuum has a wide range of applications, including low vacuum, medium vacuum, high vacuum and ultra-high vacuum
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