The velocity of electromagnetic radiation in a medium of permittivity $\in_0$ and permeability $\mu_0$ is given by

• A

  $\sqrt{\frac{\mu_0}{\varepsilon_0}}$
• B

  $\sqrt{\frac{\varepsilon_0}{\mu_0}}$
• C

  $\sqrt{\mu_0 \varepsilon_0}$
• Correct answer
  D

  $\frac{1}{\sqrt{\mu_0 \varepsilon_0}}$

Hence, the correct answer is option: 'D'.