Physics

Problem

Which one of the following expressions gives the speed

c

of an electromagnetic wave in vacuum in terms of the permeability

μ_0

and permittivity

ε_0

of free space? a)

\dfrac{2}{\sqrt{\mu_0\,\varepsilon_0}}

\dfrac{1}{2\sqrt{\mu_0\,\varepsilon_0}}

\dfrac{1}{\sqrt{\mu_0\,\varepsilon_0}}

\dfrac{1}{2\pi\sqrt{\mu_0\,\varepsilon_0}}