Question

Q10. Draw ray diagrams to represent the nature, position and size of the image formed by a
convex lens for the object placed:
(2) At 2F
(b) Between Fi and the optical centre o of the lens.
Which of the above two cases shows the use of convex lens as a magnifying glass? Give
reasons for your choice.​

Answer 1

ANSWER: (a) Object at 2F1 :

(b) Object between F1 and the optical centre O of the lens :

The case when object is between F1 and the optical centre O of the lens shows the use of convex lens as a magnifying glass. This is because here the image formed is erect and magnified.