A full vacuum, also known as "absolute vacuum," refers to a pressure level where the pressure is absolute zero, meaning there is a total absence of any gas or matter. In practical terms, achieving a full vacuum is impossible as it requires the complete removal of all molecules from a given space, which is not achievable in the real world.
In the Torr pressure unit, which is commonly used to measure vacuum levels, a full vacuum is considered to be 0 Torr. At this pressure level, there is no pressure exerted by any gas or vapor in the space, making it the lowest achievable pressure point in this scale. However, it is essential to understand that a full vacuum is a theoretical concept, and in practical applications, the lowest achievable pressure is typically very close to, but not exactly, 0 Torr. Achieving extremely low pressures is a challenging task and often requires sophisticated vacuum systems and technology.