What is the refractive index of a medium?

The focal lengtli of a equiconvex lens is 2/3 times the radius of curvature of the surface. What is the refractive index of the medium?

Statement I : Greater is the refractive index of a medium or denser the medium, lesser is the velocity of light in that Statement II : Refractive index is inversely proportional to velocity.

On what factors does the refractive index of a medium depend?

If the velocity of light in a medium is 2xx10^9 m//s What will be the refractive index of that medium?

If frequency of light increases will there be any change in the refractive index of the medium?

How does the refractive index of a medium depend on the velocity of light?

If c and c_(1) are the velocities of light in vacuum and in a medium respectively, then the relation of velocity of light with the refractive index of the medium will be

Refractive index of water with respect to air is 1.33, refractive index of oil with respect to water is 1.45 and that of glass with respect to oil is 0.78. What is the refractive index of glass with respect to air?

If a light ray incidence on a liquid from air at 45^@ and get deviated due to refraction 15^@ . What is the refractive index of the liquid?