Question

plz do it
question no. 8 ​

Answer 1

placed before 20 cm as the convex lens will converge the rays more therefore the the clear image will be formed before 20 cm which was the position earlier clear image before using second convex lens Mark brainliest pls

Answer 2

the distance less tyan 20 cm because the convering power will be increased and the clear image would me formed much closer.

hope it helps