If the speed of light Is $3\times {10}^8\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s$}\right.$, Calculate the distance covered by light in $2.00ns$.

If the speed of light in glass is $2\times {10}^{8}m/s$, and that in air is $3\times {10}^8\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s$}\right.$, calculate the refractive index of glass with respect to air?

The absolute refractive indices of glass and water are $\frac{3}{2}$ and $\frac{4}{3}$respectively. If the speed of light in the glass is $2\times {10}^8\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s$}\right.$, calculate the speed of light in

a. vacuum.

Find the refractive index of a medium if the speed of light in that medium is $2.25\times {10}^8\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s$}\right.$?

The speed of light in a transparent medium is $2.44\times {10}^8\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s$}\right.$. Find the refractive index of the medium?