Permeability and permittivity of vacuum are fundamental physical constants that describe different properties of electromagnetic fields. Permeability (μ₀) measures the ability of a material to support the formation of magnetic fields, while permittivity (ε₀) measures how an electric field affects, and is affected by, a dielectric medium. In vacuum, permeability is used to describe how magnetic fields interact with space, and permittivity relates to how electric fields propagate through it. Together, they play a crucial role in defining the speed of light in a vacuum, given by the relation ( c = \frac{1}{\sqrt{\mu₀ \epsilon₀}} ).
Copyright © 2026 eLLeNow.com All Rights Reserved.