Permittivity of Free Space -- from Eric Weisstein's World of Physics

Units and Dimensional Analysis "> Physical Constants v

Permittivity of Free Space

The quantity defined in the MKS system of units as

where c is the speed of light, is the permeability of free space. The unit F is a Farad, C is a Coulomb, and N is a Newton. The permittivity of free space is implemented as VacuumPermittivity in the Mathematica add-on package Miscellaneous`PhysicalConstants` (which can be loaded with the command <<Miscellaneous`).

Dielectric Constant, Electric Permittivity, Electric Susceptibility, Permeability of Free Space