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  3. 7th Class
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7th Class Science Sample Paper Science Olympiad Model Test Paper-8

  • question_answer
    There are two curvatures found in a convex lens. Which one of the following causes the zero optical power of the lens?

    A) Equal thickness of both the curvatures

    B) Unequal thickness of both the curvatures

    C) Equal distance between the focal point and center of the curvature

    D) All of these

    E) None of these

    Correct Answer: C

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