Question

• A point object O is placed on the principal axis of a convex
lens of focal length 20 cm at a distance of 40 cm to the
left of it. The diameter of the lens is 10 cm. If the eye is
placed 60 cm to the right of the lens at a distance h below
the principal axis, then the maximum value of h to see the
image will be
(a) 0 (b) 5 cm (C) 2.5 cm (d) 10 cm​

Answer 1

Answer:

the image of the point object will be 2.5cm