Here is the problem which I am struggling on, please help me!
Problem: You can determine the index of refraction of a substance by determining its critical angle.
Part I: What is the index of refraction of a substance that has a critical angle of 51.7° when submerged in water, which has an index of refraction of 1.333?
Part II: What would the critical angle be for this substance in air?
Show all work, use additional paper if necessary.