It is desired to obtain an erect image of an object, using concave mirror of focal length of 12 cm.
What should be the range of distance of an object placed in front of the mirror?
To obtain an erect image, the object should be placed within the focus, i.e. between the pole and the focus. Here, the focal length of the mirror is 12 cm. Hence, the object should be placed at a distance less than 12 cm.
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