A spherical mirror forms an image of magnification m=±3. The object distance, if focal length of mirror is 24 cm, may be
32 cm, 24 cm
32 cm, 16 cm
32 cm only
16 cm only
In order to obtain a magnification of, -1.5 with a concave mirror of focal length 16 cm, the object will have to be placed at a distance : (a) between 6 cm and 16 cm ,(b) between 32 cm and 16 cm (c) between 48 cm and 32 cm (d) beyond 64 cm