If you stand 3 m in front of a plane mirror, how far away would you see yourself in the mirror?
3 m
Objects placed in front of plane mirrors will have a corresponding image located behind the mirror. The distance from the image to the mirror is always identical to the distance from the object to the mirror. So if a person stands 3 meters in front of the mirror, then the image will be located an identical 3 meters behind the mirror.