MCQ
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 distant object $($preferably the sun$)$ should be focussed on the screen. What should be done for this purpose?
- AMove the screens lightly away from the mirror.
- ✓Move the mirrors lightly towards the screen.
- CMove the screen and the mirror away from the object.
- DMove the screen and the mirror towards the object.