Question

An object is placed at the centre of curvature of a concave mirror of radius of curvature $20cm$ and focal length $10cm$. At what distance from the pole will its image be formed?

Answer 1

Step-1: Given

The radius of curvature of a concave mirror, $R=20cm$

Focal length, $f=10cm$

Step-2: When the object is placed at the center of curvature of a concave mirror the position of the image will be exactly at the centre of curvature which will be inverted and of the same size as the object.

Step-3: The distance from the pole the image formed will be the same as that of the radius of curvature

The distance from the pole the image formed = radius of curvature $R=20cm$

Hence, the image will be formed at a distance of $20cm$ from the pole of the mirror.