Question

If the rays from sun converge at distance 12cm in front of a concave mirror. 1 point
Where should an object be placed so that the size of its image is equal to
that of the object? *
O
12cm in front of the mirror
between 12cm and 6 cm in front of the mirror
24cm in front of the mirror
6cm in front of the mirror​

Answer 1

Answer:

It is given that sun rays converge at 12 cm.

So, focal length of the mirror = f = 12 cm. In case of a concave mirror, the size of image and object will be same if the object is placed at 2f. Hence, in this case object must be place at 2f or 2 × 12 = 24 cm.

(c)24cm in front of the mirror is the correct answer