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→About The Permittivity of Free Space
: The '''permittivity of free space''' is denoted with the Greek letter epsilon followed by a subscript of 0 (<math>\varepsilon_0</math>).
: The [[unit]] of '''permittivity of free space''' are the [[Farad]] per [[metre]] <math>Fm^{-1}</math>.
: The '''permittivity of free space''' is a [[Universal Physical Constant|universal physical constant]] of [[magnitude]] <math>8.85\times10^{-12}Fm^{-1}</math>.
: When an [[Electrostatic Field|electrostatic field]] propagates through a [[medium]] which is not the [[vacuum]] the [[permittivity]] of that [[medium]] is given by the product of its [[Relative Permittivity|relative permittivity]] and the '''permittivity of free space'''.