Choose the correct option in question

David is observing his image in a plane mirror. The distance between the mirror and his image is 4m. If he moves 1m towards the mirrors, then the distance between David and his image will be

i. 3m ii. 5m

iii. 6m iv. 8m

The correct answer is: option (iii)

Since a plane mirror is being used in the above problem and a plane mirror the distance between the object and mirror is equal to the distance between image formed and the mirror.

Distance between mirror and image of David = 4m

When David moved 1m towards the mirror, then distance becomes = 3m

Distance of object from the mirror = distance of image from the mirror = 3m

Distance between David and his image = 3m +3m = 6m