Question

A student obtained a sharp image of the grills of a window on a screen using a concave mirror. His teacher remarked that for getting better results a well lit distance object (preferably the Sun) should be focused on the screen. What should be done for this purpose? (a) Move the screen and the mirror towards the object (b) Move the screen and the mirror away from the object (c) Move the screen slightly away from the mirror (d) Move the mirror slightly towards the screen

Answer 1

(a) Move the screen and the mirror towards the object