1. The problem statement, all variables and given/known data Light enters a solid 90 degree angled tube made of plastic having an index of refraction of 1.60. The light travels parallel to the upper part of the tube. which is horizontal You want to cut the corner of the tube so that all the light will reflect back into the tube after it strikes that face. a) what is the larget theta can be (theta is the angle from the top) if the tube is in air? b) what is the largest theta can be if the tube is in water? *diagram attached 2. Relevant equations 3. The attempt at a solution I could not find the material related to this question in the book.