What will be the location of an image formed by a flat object placed 3 meters in front of a plane mirror?

When an object is placed in front of a plane mirror, the image formed appears to be at the same distance behind the mirror as the object is in front of the mirror. For an object located 3 meters in front of the mirror, the image will thus form 3 meters behind the mirror.

The nature of plane mirrors is such that they create virtual images. These images are not actual physical entities that can be projected onto a screen; rather, they provide an appearance of being located behind the mirror due to the light reflecting off the mirror surface. The distance from the mirror surface to the image is equal to the distance from the object to the mirror surface. Therefore, since the object is 3 meters in front, the image will likewise be located 3 meters behind the surface of the mirror.