Question

A convex lens focused the sun light on a sheet of paper kept at a distance
20cm from it. The position of an object to get an erect image of it by that lens is
(a) at a distance 20cm from it. (1)
(b) at a distance 40cm from it.
(c) beyond 40cm
(d) at a distance less than 20cm from it.

PLEASE HELP ME IN THIS QUESTION

Answer 1

Explanation:

a) at a distance 20 cm from it.

Answer 2

Answer:

The answer is option a

Explanation:

from the given question object is at infinity and the image should be appear at the focus so here the erect image by the lens will be appeared at a distance of 20 cm from the lens or equal to the distance of the focal length