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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-18

  • question_answer
    Afar-sighted man cannot focus distinctly on objects closer than 120 cm. The lens that will enable him to read from a distance of 40 cm, will have a focal length of

    A)  30 cm (convex lens)

    B)  30 cm (concave lens)

    C)  60 cm (convex lens)

    D)  60 cm (concave lens)

    Correct Answer: C

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