1. The problem statement, all variables and given/known data A small tropical ﬁsh is at the center of a water-ﬁlled, spherical ﬁsh bowl 28.0 cm in diameter. (a) Find the apparent position and magniﬁcation of the ﬁsh to an observer outside the bowl. The effect of the thin walls of the bowl may be ignored. (b) Afriend advised the owner of the bowl to keep it out of direct sunlight to avoid blinding the ﬁsh, which might swim into the focal point of the parallel rays from the sun. Is the focal point actually within the bowl? 2. Relevant equations 3. The attempt at a solution (sorry my poor english) Since it is a plane interface, the lateral magnification is 1. Using m = (-na s' / nb s) and assuming that the bowl is one half of a sphere, so the object distante is 14 cm, I found for s' 10.52 cm. Then I divided 14 cm / 10.52 cm to find 1.33 (the book answer). But I'm not sure about that answer. Second, I dont understand why the focal point isn't inside the bowl, if it's equal to 7 cm.