A) 393.4 nm
B) 885.0 nm
C) 442.5 nm
D) 776.8 nm.
Correct Answer: C
Solution :
Fringe width \[=\frac{\lambda d}{D}\] \[\therefore \] \[{{\lambda }_{unknown}}=\frac{3}{4}\times 590\,nm\] \[=442.5\text{ }nm.\]You need to login to perform this action.
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