Question

An object is placed at the following distance from a convex

lens of focal length 15cm​

Answer 1

Explanation:

Answer

Here , f=15cm and 2f=30cm

(i) 20cm (Because a magnified real image is formed when the object is placed between f and 2f ).

(ii) 10cm ( Because a magnified virtual image is formed when the object is placed between f and the lens).

(iii) 35cm (Because a diminished real image is formed when the object is placed beyond 2f).

(iv) 30cm ( Because an image of same size as the object is formed when the object is placed at 2f).