<P> The refractive index n of an optical medium is defined as the ratio of the speed of light in vacuum , c = 7008299792458000000 ♠ 299 792 458 m / s , and the phase velocity v of light in the medium , </P>
<P> The refractive index n of an optical medium is defined as the ratio of the speed of light in vacuum , c = 7008299792458000000 ♠ 299 792 458 m / s , and the phase velocity v of light in the medium , </P>
the refractive index of a medium is determined by the ratio of
the refractive index of a medium is determined by the ratio of
the ratio of the speed of light in vacuum , c = 7008299792458000000 ♠ 299 792 458 m / s , and the phase velocity v of light in the medium
the ratio of the speed of light in vacuum , c = 7008299792458000000 ♠ 299 792 458 m / s , and the phase velocity v of light in the medium