Question

The image of an object formed by a mirror is real, inverted and is of magnification -1. I the. image is at a distance of 40 cm from the mirror, where is the object placed? Where would te image be if the object is moved 20 cm towards the mirror? State reason

Answer 1

.

the object is placed at a distance of 40 cm

so the focal length is equal to 20 cm
if the object is placed moved 20 cm towards mirror means
u = 20 cm

f= -20cm

so new distance of image is

.
20cm

hope its help you