Light is an electromagnetic wave. Its speed in vacuum is given by the expression
Light is an electromagnetic wave. Its speed in vacuum is given by the expression
$\sqrt{\mu_0 \varepsilon_0}$
$\sqrt{\frac{\mu_0}{\varepsilon_0}}$
$\sqrt{\frac{\varepsilon_0}{\mu_0}}$
$\frac{1}{\sqrt{\mu_0 \varepsilon_0}}$
Solution
Speed of light (EM wave) in vacuum or air is given as
$c=\frac{1}{\sqrt{\mu_0 \varepsilon_0}}$
where, $\mu_0=$ permeability of free space
and $\quad \varepsilon_0=$ permittivity of free space.