A) white fringe is formed
B) bright fringe is formed
C) uniform illumination is obtained
D) dark fringe is formed
Correct Answer: D
Solution :
Key Idea: Path difference is odd multiple of \[\frac{\lambda }{2}.\] Given path difference \[=(2n-1)\frac{\lambda }{2}\] which is an odd multiple of \[\frac{\lambda }{2}.\] Hence, destructive interference takes place and dark fringe is formed.
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