1. The given figure shows how our eye judges the distance of an object.
2. The object which is at point ‘O’ looks smaller to the observer 2 than to the observer 1 because the light rays coming from the object 1 makes a smaller angle at the eye of the observer 2 compared to observer 1.
3. The angle plays the role in sensing the size of the object.
4. Similarly, when we move the object from the mirror to our eye, the image in the mirror seems to move back in the mirror.
5. Then the distance from the image to our eye increases.
6. The angle formed by image at our eye is smaller than that of angle formed by the object.
7. That is why the image looks smaller than the object.
