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  3. 8th Class
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8th Class Science Sample Paper Science Olympiad Model Test Paper-21

  • question_answer
    If focal length of a convex lens is 80 cm, what will be the power of the lens?

    A) \[+1.5\]diopter

    B) \[-1.5\]diopter

    C) \[+1.25\]diopter

    D) \[-1.25\]diopter

    E) None of these

    Correct Answer: C

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