How Does Refractive Index Relate to Wave Velocity Changes Between Media?

[Astar]

Homework Statement

Define refractive index in terms of changes in the velocity of a wave in passing from one medium to another.

Homework Equations

The Attempt at a Solution

Would I be right in saying that in terms of the question above, refractive index is the constant found between the velocity of a wave in one medium, divided by the velocity of that same wave in another medium that it is traveling into.

I just wanted to make sure as this is a syllabus question for my exams... thanks for any help.

 

[rl.bhat]

You are right.