Give object and image distances, type, size and magnification for object placed in front of thin lens.

Explanation

Convex lens :
(i) Object position : (u = `infty`)
Image position : At F
Image type : Real and inverted
Image size : Highly diminished
Magnification :m `lt lt` -1

(ii) Object position : Between 2F and `infty`
Image position : Between F and 2F
Image type : Real and inverted
Image size : Diminished
Magnification :m `lt` -1

(iii) Object position : At 2F (u = 2F)
Image position : At 2F
Image type : Real and inverted
Image size : Same as of object
Magnification : m = -1

(iv) Object position : Between F and 2F
Image position : Between 2F and `infty`
Image type : Real and inverted
Image size : Magnified
Magnification : m `gt `-1

(v) Object position : At F
Image position : At `infty`
Image type : Real and inverted
Image size : Highly magnified
Magnification : m `gt gt` -1

(vi) Object position : Between F and P
Image position : In direction of object
Image type : Virtual and erect
Image size : Magnified
Magnification : m `gt` 1

Concave lens :
(vii) Object position : At `infty`
Image position : At F (towards object)
Image type : Virtual and erect
Image size : Point like
Magnification : m `lt lt ` + 1

(viii) Object position : At any distance on axis
Image position : Between optical centre and F
Image type : Virtual and erect
Image size : Diminished
Magnification : m `lt` +1