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

  • question_answer
    In Young?s double slit experiment, the intensity of light coming from the first slit is double the intensity from the second slit. The ratio of the maximum intensity to the minimum intensity on the interference fringe pattern observed is                                                                            [KCET 2002]

    A)            34  

    B)            40

    C)            25  

    D)            38

    Correct Answer: A

    Solution :

               \[\frac{{{I}_{\max }}}{{{I}_{\min }}}={{\left( \frac{\sqrt{\frac{{{I}_{1}}}{{{I}_{2}}}}+1}{\sqrt{\frac{{{I}_{1}}}{{{I}_{2}}}}-1} \right)}^{2}}={{\left( \frac{\sqrt{2}+1}{\sqrt{2}-1} \right)}^{2}}\approx 34;\] (given I1 = 2I2)


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