Vacuum Permittivity

Vacuum permittivity, often symbolized as ε₀, is a fundamental constant that measures how much electric field is "permitted" or can exist in a vacuum—the space without matter. It essentially quantifies the ability of a vacuum to support electric forces between charged particles. The higher the vacuum permittivity, the more easily an electric field can establish itself in empty space. It plays a key role in equations describing electromagnetism, linking electric field strength to the amount of charge creating it, and helps define the behavior of electric forces in the universe.