1. The diagram shows a few rays starting from the tip of the flame.
2. The reflected rays intersect A. So the reflected image of tip of flame will be at intersection point A.
3. If we hold the paper at any point before or beyond point A (for example at point B), we see that the rays will meet the paper at different points,
4. So the image of the tip of the flame will be formed at different points due to these rays.
5. If we draw more rays emanating from the same tip we will see that point A they will meet but at point ‘B’ they won’t.
6. So the image of the tip of the flame will be sharp if we hold the paper at A and become blurred (due to mixing of multiple images) when we move the paper slightly in any direction (forward or backward).
