Q: Which one of the following combinations of source and screen would produce sharpest shadow of an opaque object?
(a)A point source and an opaque screen
(b)An extended source and an opaque screen
(c)A point source and a transparent screen
(d)An extended source and a transparent screen
Correct Answer: (a)
The correct answer is (d) 'An extended source and a transparent screen'. This question from the General Studies domain tests knowledge of Miscellaneous.