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JEE Main & Advanced Physics Wave Optics / तरंग प्रकाशिकी Question Bank Young's Double Slit Experiment and Biprism

  • question_answer
    The slits in a Young's double slit experiment have equal widths and the source is placed symmetrically relative to the slits. The intensity at the central fringes is I0. If one of the slits is closed, the intensity at this point will be                    [MP PMT 1999; Orissa JEE 2004; Kerala PET 2005]

    A)            I0    

    B)            I0 / 4

    C)            I0 / 2                                         

    D)            4I0

    Correct Answer: B

    Solution :

               If intensity of each wave is I, then initially at central position \[{{I}_{o}}=4I.\]when one of the slit is covered then intensity at central position will be I only i.e., \[\frac{{{I}_{o}}}{4}\].


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