1)For my homework, I received a question, I'm supposed to use Snells law and a protractor. Basically, I have an odd shaped object that forms a messed up sphere. I have an arrow going in at a specific point and I'm given n = 1.0 (for the light ray outside the sphere) and n = 1.2 (for inside the sphere) I know how to apply the two numbers into snells law but I don't know how I'm supposed to come up with an angle. It is not a triangle so I can't use trigenometry to figure it out. 2) Proove mathematically using the mirror equation that when an object is far away from a concave mirror, its image can be found at the focal point. Explain any assumptions. As far as I got with question 2 is di = f I simply can't understand this.