An object is placed (a) 20 cm, (b) 4 cm, in front of a concave mirror of focal length 12 cm. Find the nature and position of the image formed in each case.

(a) The image distance from the pole is -30 cm; the nature and position of the image formed in each case is that image is formed at a distance of 30 cm in front of mirror (on its left side); Real and inverted

(b) The image distance from the pole is + 6 cm; the nature and position of the image formed in each case is that image is formed at a distance of 6 cm behind the mirror (on its right side); Virtual and erect


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