JEE Main & Advanced Physics Wave Optics / तरंग प्रकाशिकी Question Bank Diffraction of Light

  • question_answer
    If we observe the single slit Fraunhofer diffraction with wavelength l and slit width e, the width of the central maxima is 2q. On decreasing the slit width for the same l  [UPSEAT 2004]

    A)            q increases

    B)            q remains unchanged 

    C)            q decreases

    D)            q increases or decreases depending on the intensity of light

    Correct Answer: A

    Solution :

                       \[2\theta =\frac{2\lambda }{d}\] (where d = slit width) As d decreases, q increases.


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