If $\mu_0$ is permeability of free space and ε0 is permittivity of free space, the speed of light in vacuum is given by
Answer & explanation
Correct answer: option 3
The speed of light in vacuum is given by $\sqrt{\frac{1}{\mu_0ε_0}}$, where $\mu_0$ is permeability and ε0 is permittivity of free space.