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UPSC Physics Electric Current and Magnetism Question Bank Electricity, Magnetism and Light

  • question_answer
          Two thin convex lenses of focal lengths 4 cm and 8 cm are separated by a distance of 4 cm in air. The combination will have the focal length                           [NDA]

    A) 4 cm         

    B)      8 cm

    C) 12 cm              

    D)      32 cm

    Correct Answer: A

    Solution :

    Not Available 


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