What is physical significance of refractive index?

Related questions

1. What is the formula of Snell's Law?
2. What is refractive index formula?
3. Why is refractive index important?
4. How do you calculate refractive index Speed?
5. What is the relation between refractive index and speed of light?
6. Which material has highest refractive index?
7. Why is red the least deviated color?
8. Why does red light bend the least?
9. What is relative refractive index?
10. How does refractive index vary with wavelength?

Tags

1. #which
2. #given
3. #travels
4. #through
5. #light
6. #refractive
7. #medium
8. #vacuum
9. #index
10. #divide
11. #quickly
12. #number
13. #relates
14. #speed