1. The image formed by a plane mirror is virtual, erect, and laterally inverted.
2. The size of the image is equal to the size of the object.
3. The image distance far behind the mirror is equal to the object distance in front of it.
4. If an object is placed between two plane mirrors inclined at an angle 0, then the number of images n formed is as, n = \((\frac{360}{θ}-1)\)