A student focuses the image of a well illuminated distant object on a screen using a convex lens. After that he gradually moves the object towards the lens and each time focuses its image on the screen by adjusting the lens.
(i) In which direction-towards the screen or away from the screen does he move the lens ?
(ii) What happens to the size of the image-does it decrease or increase ?
(iii) What happens to the image on the screen when he moves the object very close to the lens ?
