Concave Lens
S No. | Position of Object | Position of Image | Size of Image | Nature of Image |
1. | At infinity | At the focus | Highly diminished, Point sized | Virtual and erect |
2. | Between the infinity and optical centre | Between focus and optical centre | Diminished | Virtual and erect |
concave mirror
S No. | Position of Object | Position of Image | Size of Image | Nature of Image |
1. | At infinity | At the focus F | Highly diminished | Real and inverted |
2. | Beyond the centre of curvature C | Between F and C | Diminished | Real and inverted |
3. | At the centre of curvature C | At C | Same size | Real and inverted |
4. | Between C and F | Beyond C | Enlarged | Real and inverted |
5. | At focus F | At infinity | Highly enlarged | Real and inverted |
convex mirror
S No. | Position of Object | Position of Image | Size of Image | Nature of Image |
1. | At infinity | At the focus F, behind the mirror | Highly diminished | Virtual and erect |
2. | Between infinity and the pole P | Between P and F, behind the mirror | Diminished | Virtual and erect |
Convex Lens
S No. | Position of Object | Position of Image | Size of Image | Nature of Image |
1. | At infinity | At the focus | Highly diminished, Point sized | Real and inverted |
2. | Beyond 2F | Between the focus and centre of curvature | Diminished | Real and inverted |
3. | At 2F | At the centre of curvature | Same size | Real and inverted |
4. | Between F and 2F | Beyond the centre of curvature | Enlarged | Real and inverted |
5. | At the focus F | At infinity | Highly enlarged | Real and inverted |
6. | Between the focus F and optical centre C | Behind the object | Enlarged | Virtual and erect |