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12th Class Physics Wave Optics / तरंग प्रकाशिकी Question Bank MCQs - Wave Optics

  • question_answer
    When a monochromatic light is passed around a file wire a diffraction pattern is observed. How the fringe width will change by increasing the diameter?

    A) Fringe width has no relation with the diameter of wire

    B) Increases

    C) Decreases

    D) Fringe width changes with change of wavelength only

    Correct Answer: C

    Solution :

    Option [c] is correct. Explanation:\[\beta =\lambda \operatorname{D}/d\], where d is the diameter of the wire. So, if the diameter increases, fringe with decreases.


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