Question

It was observed that when the distance between an object and a lens decreases, the size of the image increases. What is the nature of this lens? If you keep on decreasing the distance between the object and the lens, will you still able to obtain the image on the screen? Explain.

Answer 1

It is a convex lens.
No, when the object is placed close to a convex lens then the image formed is virtual which cannot be obtained on screen.