Question

an object is placed at a distance of 12 CM in front of a concave mirror forms a real image four times larger than the object calculate the distance of the image from the mirror

Answer 1

Object distance u =-12cm

Magnification of the image= +4

We know that,

Magnification=v/u

+4=v/-12

v=-12×4

v=-48cm

Therefore the image distance v = -48cm

Answer 2

use m = -v/u
subs the values and get answer