Define refractive index. On which factors it depends on?

Define absolute refractive index.

What is absolute refractive index? On which factors refractive index depends?

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

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

Absolute refractive index of vaccum is

What is power of a lens? On which factor its depends? What it its unit?

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

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

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

A lens of refractive index 1.5 is kept in a medium of refractive index 1.5. The refractive index of the lens with respect to the medium will be