1. The problem statement, all variables and given/known data 1. The index of refraction for water is 1.33 and that of glass is 1.50. a. What is the critical angle for a glass-water interface? b. In which medium is the light ray incident for total internal reflection? 2. Relevant equations nisin[tex]\vartheta[/tex]i=nrsin[tex]\vartheta[/tex]r 3. The attempt at a solution a. I think the answer to a. is 62.46 degrees, but I am not sure. b. I think the answer is glass, simply because it is going to be moving from a less dense area to a more dense area.