Concave Lenses
(i)When an object is placed at infinity,
Position of Image – at the focus.
Nature of Image –highly diminished and point size.
(ii)When an object is placed at a finite distance from the lens,
Position of Image – between the optical centre and the focus .
Nature of Image –Virtual, The size of the image is smaller than that of the object.
Image formation by Concave Lens
| Object Location | Image Location | Image Nature | Image Size |
| Infinity at F1 | Virtual and Erect | Highly diminished | Highly diminished and point size |
| Beyond Infinity and Optical Centre | Between Focus (F1) and Optical center (O) | Virtual and Erect | Diminished |