If an object is placed at a distance of 5cm from a plane mirror,how far would it be from its image,and why?
Answers
The distance between image and object depend upon the type of mirror.
If it is a plane mirror, then distance between image and object should be 10 cm. Image is formed from the plane mirror at a distance equal and opposite to that of the object-mirror distance.
So, image-mirror distance is 5cm, and object image distance is 10cm.
The given object will be at a distance of 10 cm from its image in the plane mirror.
Given,
An object is placed at 5 cm from a mirror.
To find,
How far is the object from its image, and why?
Solution,
It is given here that, the object is at a distance of 5 cm in front of a plane mirror.
A plane mirror is one that has a planar or flat surface on which reflection occurs. The image is obtained behind the mirror and is virtual.
Now, in a plane mirror, the distances of both the object and the image are the same from the mirror.
Thus, the distance between object and image (say x) shall be twice the distance between object and mirror (that is, 2x).
The given object is 5 cm from the mirror.
⇒ distance between the object and its image = 2×5 = 10 cm.
Therefore, the given object will be at a distance of 10 cm from its image in the plane mirror.