NEET Sample Paper NEET Sample Test Paper-90

  • question_answer
    If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by a monochromatic blue light of the same intensity

    A) fringe width will decrease

    B) fringe width will increase

    C) fringe width will remain unchanged

    D)  fringes will become less intense

    Correct Answer: A

    Solution :

    [a] As \[\beta =\frac{\lambda D}{d}\] and \[{{\lambda }_{b}}<{{\lambda }_{y}},\] \[\therefore \] Fringe width P will decrease


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