Question

The speed of an electromagnetic wave in a material medium of permeability. $\mu$ and permittivity $\varepsilon$ is

• A. $\frac{1}{\mu\varepsilon}$
• B. $\frac{1}{2\mu\varepsilon}$
• C. $\frac{1}{\sqrt{\mu\varepsilon}}$
• D. $\frac{1}{\sqrt{2\mu\varepsilon}}$
• E. $\frac{2}{\mu\varepsilon}$

Answer 1

Answer: (C)

If the absolute magnetic permeability of a medium is $\mu$ and its absolute electric permittivity is $\varepsilon$, the speed of electromagnetic wave in that medium,
$v=\frac{1}{\sqrt{\mu \varepsilon}}$