Vacuum Chambers

“Vacuum” means the complete absence of matter. In order to create vacuum conditions, pressure within a given space must be lower than the surrounding environment. The quality of the vacuum is dependent upon several factors, including the number of particles within a given space. The inertia of moving particles exerts pressure, so fewer particles means lower pressure. Scientists have given up on the idea that a perfect vacuum is even possible; space is the most ideal vacuum we know of, but hydrogen atoms, energy waves and other moving particles are still present.