Question

If ${\mu }_0$ is permeability of free space and ${ϵ}_0$ is permittivity of free space, the speed of light in vacuum is given by

• A. $\sqrt{{\mu }_0{ϵ}_0}$
• B. $\sqrt{\frac{{\mu }_0}{{ϵ}_0}}$
• C. $\sqrt{\frac{1}{{\mu }_0{ϵ}_0}}$
• D. $\sqrt{\frac{{ϵ}_0}{{\mu }_0}}$

Answer 1

The correct option is C $\sqrt{\frac{1}{{\mu }_0{ϵ}_0}}$

${ϵ}_o=\frac{1}{{\mu }_o{c}^2}$

$c=\sqrt{\frac{1}{{\mu }_o{ϵ}_o}}$