Question

An object is situated at a distance of $18cm$from a plane mirror. What is the distance between the object and its image formed by the mirror?

Answer 1

1. Plane mirror always forms virtual, erect and laterally inverted image.
2. T For a plane mirror the distance of the image from the mirror is same as the distance of the object in front of the mirror.
3. Since the distance of the object from the mirror is$18cm$, therefore the distance of the image will be$18cm$ from mirror.
4. Therefore, the total distance between the object and image is$36cm$.

Hence, the total distance between the object and image is$36cm$.