JEE Main & Advanced Physics Communication System / संचार तंत्र Question Bank Self Evaluation Test - Communication System

  • question_answer
    The attenuation in optical fibre is mainly due to

    A) absorption

    B) scattering

    C) neither absorption nor scattering

    D) both (a) and (b)

    Correct Answer: D

    Solution :

    [d] 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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