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  2. Vacuum cleaner - Wikipedia

    en.wikipedia.org/wiki/Vacuum_cleaner

    A vacuum cleaner, also known simply as a vacuum, is a device that uses suction, and often agitation, in order to remove dirt and other debris from carpets and hard floors. The dirt is collected into a dust bag or a plastic bin. Vacuum cleaners, which are used in homes as well as in commercial settings, exist in a variety of sizes and types ...

  3. Vacuum - Wikipedia

    en.wikipedia.org/wiki/Vacuum

    A vacuum ( pl.: vacuums or vacua) is space devoid of matter. The word is derived from the Latin adjective vacuus (neuter vacuum) meaning "vacant" or "void". An approximation to such vacuum is a region with a gaseous pressure much less than atmospheric pressure. [1]

  4. Field electron emission - Wikipedia

    en.wikipedia.org/wiki/Field_electron_emission

    Large-area field emission sources have been of interest since the 1970s. In these devices, a high density of individual field emission sites is created on a substrate (originally silicon). This research area became known, first as "vacuum microelectronics", now as "vacuum nanoelectronics".

  5. Vacuum chamber - Wikipedia

    en.wikipedia.org/wiki/Vacuum_chamber

    Vacuum chamber. A large vacuum chamber. A small vacuum chamber for studio or lab use in de-airing materials such as mold rubbers and resins. A vacuum chamber is a rigid enclosure from which air and other gases are removed by a vacuum pump. This results in a low- pressure environment within the chamber, commonly referred to as a vacuum.

  6. False vacuum - Wikipedia

    en.wikipedia.org/wiki/False_vacuum

    A true vacuum is stable because it is at a global minimum of energy, and is commonly assumed to coincide with the physical vacuum state we live in. It is possible that a physical vacuum state is a configuration of quantum fields representing a local minimum but not global minimum of energy. This type of vacuum state is called a "false vacuum".

  7. Vacuum energy - Wikipedia

    en.wikipedia.org/wiki/Vacuum_energy

    The field strength of vacuum energy is a concept proposed in a theoretical study that explores the nature of the vacuum and its relationship to gravitational interactions. The study derived a mathematical framework that uses the field strength of vacuum energy as an indicator of the bulk (spacetime) resistance to localized curvature.

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