Two coherent light sources P and Q each of wavelength \[\lambda \] are separated by a distance \[3\,\lambda \]as shown. The maximum number of minima formed on line AB which runs from \[-\,\infty \] to \[+\,\infty \]is: |
A) 2
B) 4
C) 6
D) 8
Correct Answer: C
Solution :
There can be three minima from central point to \[\infty \] corresponding to \[\frac{\lambda }{2},\]\[\frac{3\lambda }{2},\]\[\frac{5\lambda }{2}\] path differences. \[\therefore \] total number of minima \[=2{{n}_{\max }}=6\]You need to login to perform this action.
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