The radius of curvature of a converging mirror is 30 cm. At what distance from the mirror should an object be placed so as to obtain a virtual image?
(a) infinity
(b) 30 cm
(c) Between 16 cm and 30 cm
(d) Between 0 cm and 15 cm
(a) infinity
(b) 30 cm
(c) Between 16 cm and 30 cm
(d) Between 0 cm and 15 cm