vaakumid
Vaakumid refer to regions or states in which the pressure is far below atmospheric pressure, or in which matter is largely absent. In physics, a vacuum is not absolute emptiness but a state in which particle density is extremely low. Practical vacuums are described by the absolute pressure, measured in units such as pascals (Pa) or torr; atmospheric pressure is about 101,325 Pa or 760 torr.
Vacuum technology relies on pumps, gauges, and chamber systems to create and maintain low-pressure environments. Common
Vacuum levels are typically categorized as rough or low vacuum, high vacuum, and ultrahigh vacuum, with the
Historically, attempts to study vacuums date to early barometers and experiments by Torricelli and Evangelista Torricelli
Beyond classical vacuums, the quantum vacuum in physics denotes the lowest-energy state of a field, which exhibits