JEE Main & Advanced Physics Communication System / संचार तंत्र Question Bank Communication

  • question_answer
    The attenuation in optical fibre is mainly due to [AFMC 2003]

    A)            Absorption

    B)            Scattering

    C)            Neither absorption nor scattering

    D)            Both (a) and (b)

    Correct Answer: D

    Solution :

               A very small part of light energy is lost from an optical fibre due to absorption or due to light leaving the fibre as a result of scattering of light sideways by impurities in the glass fibre.  


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