The left end of a long glass rod, 6.00 cm in diameter, has a convex hemispherical surface 3.00 cm in radius. The refractive index of the glass is 1.60.
1) Decide the position s_b of the image of an object placed in air on the axis of the rod infinitely far from the left end of the rod.
2) Decide the position s_b of the image if an object is placed in air on the axis of the rod 16.0 cm to the left of the end of the rod.
3) Decide the position s_b of the image if an object is placed in air on the axis of the rod 1.00 cm from the left end of the rod.