Question

A mirror produces a magnification of +3, when an object is at a distance 20 cm from the mirror, find position of image.

Answer 1

Given,

Linear Magnification (m) = +3

Object Distance (u) = 20 cm (negative)

According to the question,

m = -(v/u)

.... where 'v' is the position of Image

+3 = -(v/-20)

+3 = v/20

+60 cm = v

Image is 60 cm away from the mirror and it is a virtual image and a magnified one i.e. size of image is triple the size of object.

I hope this helps.