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

What is the refractive index of a medium?

Does the refractive index of glass depend on the colour of light? If so, how?

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

Can absolute refractive index of a medium exceed unity?

If the refractive index of water is (4)/(3) and the velocity of light in vacuum is 3 xx 10^(8)m * s^(-1) , how much time will light take to travel a distance of 900 m in water? '

Refractive index of glass is 1.5. What is the velocity of light in glass?

Define relative refractive index. What is its relation with velocity of light?

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.

The refractive index of a medium depends on tempera-ture'- is the statement correct on wrong?

Refractive index of glass is maximum for the colour of white light