1. The problem statement, all variables and given/known data On a vacation, you are scuba-diving and using a diving mask that has a face plate and that bulges outward with a radius of curvature of 0.50 m. As a result, a convex spherical surface exists between the water and the air in the mask. A fish swims by you 2.5 m in front of your mask. (a) How far in front of the mask does the fish appear to be? 2. Relevant equations n1/s+n2/s'=(n2-n1)/r 3. The attempt at a solution The viewer is obviously inside the diving mask, so we make everything with respect to that. n1=1, n2=1.33, s=-2.5 (since the object is located on the other side of the faceplate), r=.5. That however is not getting me the right answer. What am I doing wrong?