| Assertion (A): No interference pattern is detected when two coherent sources are too dose to each other. |
| Reason (R): The fringe width is inversely proportional to the distance between the two slits. |
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
Correct Answer: A
Solution :
| Option [a] is correct. |
| 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. |
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