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10th Class Science Human Eye and Colourful World Question Bank Light and Human Eye

  • question_answer
    Which of the following statements is incorrect?

    A) The focal length of a convex lens is considered positive

    B) The focal length of convex mirror is considered positive

    C) The power of convex lens is always negative

    D) All the above

    E) None of these

    Correct Answer: C

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