A) \[\sqrt{\frac{\mu \varepsilon }{{{\mu }_{0}}{{\varepsilon }_{0}}}}\]
B) \[\sqrt{\frac{{{\mu }_{0}}{{\varepsilon }_{0}}}{{{\varepsilon }_{0}}}}\]
C) \[\frac{\mu \varepsilon }{{{\mu }_{0}}{{\varepsilon }_{0}}}\]
D) \[{{\left( \frac{\mu \varepsilon }{{{\mu }_{0}}{{\varepsilon }_{0}}} \right)}^{2}}\]
Correct Answer: A
Solution :
: Refractive index of medium \[=\frac{Velocity\text{ }in\text{ }vacuum}{Velocity\text{ }in\text{ }medium}\] \[\therefore \] \[\mu =\frac{1/\sqrt{{{\mu }_{0}}{{\varepsilon }_{0}}}}{1/\sqrt{\mu \varepsilon }}\] or \[\mu =\sqrt{\frac{\mu \varepsilon }{{{\mu }_{0}}{{\varepsilon }_{0}}}}\]
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