Question

If ${ϵ}_0$ and ${\mu }_0$ represent the permittivity and permeability of vacuum and $ϵ$ and $\mu$ represent the permittivity and permeability of medium, then refractive index of the medium is given by

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Refractive index $=\frac{c_0}{c}=\frac{\frac{1}{\sqrt{{\mu }_0{ϵ}_0}}}{\frac{1}{{\mu }_0{ϵ}_0}}$


$=\sqrt{\frac{\mu ϵ}{{\mu }_0{ϵ}_0}}$