Question

The speed of an electromagnetic wave through a medium, depends upon

$\left(i\right)$ permittivity of the medium

$\left(ii\right)$ permeability of the medium

$\left(iii\right)$ density of the medium

$\left(iv\right)$ physical state of the medium

• A. $\left(i\right)$, $\left(ii\right)$ and $\left(iii\right)$
• B. $\left(i\right)$ and $\left(ii\right)$
• C. $\left(i\right)$ and $\left(iii\right)$
• D. $\left(ii\right)$ and $\left(iii\right)$

Answer 1

The correct option is B $\left(i\right)$ and $\left(ii\right)$

The speed of an electromagnetic wave through a medium is given by,
$c=\frac{1}{\sqrt{\mu ϵ}}$

Here, $\mu \to \text{permeability of the medium}$
$ϵ\to \text{permittivity of the medium}$

Hence, $\left(B\right)$ is the correct answer.