Question

Ramesh obtained a sharp image of the grill of a window on a screen, using a convex lens. he then thought of focusing a distant building instead of the grill. what should he do to obtain clear image on screen?

(a)keep the lens behind the screen

(b)move the lens towards the screen

(c)move lens away from the screen

(d)keep distance between lens and screen unchanged.

plez give the explanation for this question.

Answer 1

c) To get a sharp image of the distant building the lens should be moved away from the screen as the focus point would lie beyond the screen