question_answer

If \[{{\varepsilon }_{0}}\] and \[{{\mu }_{0}}\] are the electric permittivity and magnetic permeability in vacuum, \[\varepsilon \] and \[\mu \] are corresponding quantities in medium, then refractive index of the medium is

A) \[\sqrt{\frac{\varepsilon }{{{\varepsilon }_{0}}}}\]  

B) \[\sqrt{\frac{{{\varepsilon }_{0}}\mu }{\varepsilon {{\mu }_{0}}}}\]

C) \[\sqrt{\frac{{{\varepsilon }_{0}}{{\mu }_{0}}}{\varepsilon \mu }}\]

D) \[\sqrt{\frac{\varepsilon \mu }{{{\varepsilon }_{0}}{{\mu }_{0}}}}\]