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J & K CET Engineering J and K - CET Engineering Solved Paper-2009

  • question_answer
    In a typical optical fibres, the difference between the refractive indices of core material and cladding material is of the order of

    A)  \[{{10}^{-5}}\]           

    B)  \[{{10}^{-6}}\]

    C)  \[{{10}^{-1}}\]           

    D)  \[{{10}^{-3}}\]

    Correct Answer: C

    Solution :

    The refractive index of the glass used for making core \[({{\mu }_{1}}=1.7)\] is slightly more than the refractive index of the glass \[(\mu =1.5)\] used for making the cladding.


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