Question

Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed:
(a) at 2F₁
(b) between F₁ and the optical center O of the lens

Answer 1

(a) When the object is at 2F₁



Nature of the image formed: Real and inverted
Position of the image formed: At 2F₂
Size of the image formed: Same as that of the object

(b) When the object is placed between the focus F₁ and optical center O.




Nature of the image formed: Virtual and erect
Position of the image formed: Same side of the object, beyond the 2F₁
Size of the image formed: Enlarged