[" 15.0cm radius bowl,where does it appear to an observer outside the bowl."],[" A paralle l beam of light enters a clear plastic bead "2.50cm" in diameter and index "1.44." At what point "],[" beyond the bead are these rays brought to a focus? "],[" The left end of a long gaas rod of index "1.6350" is ground and polished to a convex spherical surface of "],[" radius "2.50cm." A small obiect is located is the sircents and polished to a convex spherical surface of "]