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KVPY Sample Paper KVPY Stream-SX Model Paper-30

  • question_answer
    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 \[\varphi \phi \] is:

    A) 2

    B) 4   

    C) 6         

    D) 8

    Correct Answer: C

    Solution :

    There can be three minima from central point to corresponding to \[\frac{\lambda }{2},\]\[\frac{3\lambda }{2},\]\[\frac{5\lambda }{2}\] path differences.
    \[\therefore \]Total number of minima \[=2{{n}_{\max }}=6\]


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