What is n1 and n2 in Snell's law?

Related questions

1. What is the physical significance of refractive index?
2. What is the use of refractive index?
3. What is the relationship between refractive index and wavelength?
4. What is the formula for refractive index?
5. What is refractive index with example?
6. What is relative refractive index?
7. What is n1 in Snell's law?
8. What is physical significance of refractive index?
9. What is refractive index formula?
10. Which light has highest refractive index?

Tags

1. #called
2. #total
3. #internal
4. #smallest
5. #refraction
6. #using
7. #occurs
8. #larger
9. #snell
10. #critical
11. #angle
12. #incidence
13. #reflection
14. #there
15. #which