(i) Draw the ray diagram in each case to show the position and nature of the image formed when the object is placed.
(a) at 2F of a convex lens
(b) between O and F of convex lens
(c) in front of a concave lens.
(ii) An object of size 2.0 cm is placed at 30.0 cm in front of a convex lens of focal length 20.0 cm. Find the distance from the lens at which a screen should be placed in order to obtain sharp image. What will be the nature of the image formed?
