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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-13

  • question_answer
    Optical fibers are used for communication in LASER because

    A)  Interference is produced by other lasers

    B)  They ensure that the beam does not scatter

    C)  They produce atmospheric interference

    D)  None of the above

    Correct Answer: B

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