^Image formation by a lens
^Image formation by a lens
(a) A concave lens always form virtual, erect & diminished image irrespective of the position of the object.
(b) With a convex lens following possibilities are there
Position of object |
Ray diagram |
Image produced |
At ∞ |
 |
At FReal (inverted)Extremely Diminishedm < < 1 |
Beyond C i.e.Between ∞ and 2 F |
 |
Between F & CReal (inverted)Diminishedm < 1
|
At C |
 |
At CReal (inverted)Same as size of object
|
Between F and C |
 |
Beyond CReal (inverted)Magnified |
Object at F |
|
At ∞Real (inverted)Infinite sizem → ∞ |
Between F and P |
|
Beyond 2 F Virtual (erect)Magnifiedm > 1 |
