Question

A mirror forms a real image equal to the size of the object. If focal length of mirror is 10 cm
then the object position from pole of the mirror is
(A) 10 cm
(8) 20 cm
(C) 30 cm W (D) 40 cm
D40​

Answer 1

Answer:

20 cm

Explanation:

If the object size and the image size are equal, then the object is on the centre of curvature.

we know that

f = r/2

then,

r = 2 f

so, 2 x 10 = 20 cm