Question

Monika, $145$cm tall stood at a distance of $2$ m away from a plane mirror.

a. What is the distance between Monika and her image?
b. What will be the height of Monika’s image?
c. What will be the distance between Monika and her image if she walks a distance of $1$m towards the mirror?

Answer 1

a) The object and the image are twice the length of the object to the mirror

So, the distance between Monika and her image is $2m+2m=4m$

b). The image formed by the plane mirror is of equal height to that of the object

So, the height of the image is$145cm$ as it is the height of Monika.

c) When she walks a distance of$1m$ there will be only$1m$distance between her and the mirror

So, the new distance between Monika and her image is $1m+1m=2m$