They converge to the focal point. So a point sized image is formed at the focal point. This can be seen in fig.-s 8(a).

2.object placed beyond the centre of curvature on the principle axis

In fig.- (13) you notice that when object is placed beyond the centre of curvature (C₂), a real, inverted and diminished image is formed on the principal axis between the points F₁and C₁.

In fig.- (13) we have chosen two rays, one ray passing parallel to the principal axis and another ray passing through the optic centre to locate the position of the image.

Try to draw ray diagram using the pair of rays, one passing parallel to the axis another passing through the focus.

3.object placed at the centre of curvature

hen an object is placed at the centre of curvature (C₂) on the principal axis, you will get an image at C₁which is real, inverted and of the same size as that of object. See fig.- 14

4.object placed between the centre of curvature and the focal point

When an object is placed between centre of curvature (C₂) and focus (F₂), you will get an image which is real, inverted and magnified. See fig.- 15. The image will form beyond C₁

5. Object located at the focal point

When an object is placed at focus (F₂), the image will be at infinity. See fig.- 16. When the image is formed at an infinite distance away we can not discuss the size and nature of the image.