1. The problem statement, all variables and given/known data what is the minimum value that the index of refraction can have? 2. Relevant equations n1sin[tex]\Theta[/tex]i = n2sin[tex]\Theta[/tex]r 3. The attempt at a solution my choices are: A - between 0 and 1 B - +1 C - -1 D - 0 all listed values in my given chart are over 1. but that is not to say there is something else it can be. how can i determine this for sure?