Assertion (A) : No interfrence pattern is detected when two coherent sources are very closer to each other. (i.e separation almost zero)
Reason (R ) : The fringe width is inversely proportional to the distance between the two slits

Options

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is NOT the correct explanation of A
C. A is true but R is false
D. A is false and R is true

Answer

A

Explanation

No interference pattern is. detected when two coherent sources are too close to each other: The assertion is true.
Fringe width is proportional to 1/d When d becomes too small, the fringe width becomes too large. So no pattern will be visible. So, the reason is also true. Reason also explains the assertion