If an object is placed at a distance of 0.5 m in front of a plane mirror, the distance between the object and the image formed by the mirror will be

The image formed by the mirror is at same distance behind the mirror as object is in front of it, now

If distance of object from mirror = 0.5 m

Then distance of image from mirror = 0.5 m

So, distance between object and mirror = 0.5 m+ 0.5m = 1m