Question

Mona is 150 cm tall and standing at the distance of 2 meter away from plane mirror.
1. what will be the distance between mona and her image?
2. what will be the height of mona's image?
3. what will be the distance between mona and her image if she walks a distance of 1 m towards the mirror?

Answer 1

a. distance of the image in the relation of the object 2times the distance between image and mirror so distance between mona and her image is 4m
c.2metre
b. magnification of image equal to v/u here v equal to image distance and u equal to object distance so 2/2 =1, m = height of image /height of objects so m=1 then height of image/ 150cm = 1 so height of image equal to 150cm