Question

The image of an object formed by a mirror is real, inverted and is of magnification −1. If the image is at a distance of 30 cm from the mirror, where is the object placed? Give reason to justify your answer.

Answer 1

Magnification, `m = (-v)/u`

Given, `m = - 1, v = - 30  cm`

`-1 = (-30)/u`

`u` = 30 cm, an object is placed at a distance of 30 cm from the mirror.

Justification:

To satisfy these conditions, place the object at the focal point of the mirror, resulting in a single image of the same size.