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1. Permeability Of Free Space

   Linked via "material media"

   The permeability of free space, denoted by the symbol $\mu0$ (mu-naught), is a fundamental physical constant that describes the degree to which a magnetic field can permeate or be sustained within a vacuum. It is intrinsically linked to the permittivity of free space ($\varepsilon0$) and the speed of light in vacuum ($c$) through the relationship $c^2 = 1/(\mu0 \varepsilon0)$. Historically, $\mu_0$ was defined precisely via the [a…