Question

Where should an object be placed from a concave mirror of focal length 10 cm, so as to obtain a real image of magnification 2?

Answer 1

Answer:

20 cm

Explanation:

focal length = 10 cm

so the centre of curvature of a concave mirror is at a distance of twice the focal length so 2 * 10 = 20 cm, thus the answer is 20 cm