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[" The radii of curvature of a double co...

[" The radii of curvature of a double convex lens of "],[" glass "(mu=1.5)" are in the ratio of "1:2." This lens "],[" renders the rays parallel coming from an "],[" illuminated filament at a distance of "6cm" ."],[" Calculate the radii of curvature of its surfaces."]

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