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write two uses each of concave and convex lenses in daily life write two uses each of concave and convex lens list two uses each of concave and convex lenses write two uses of each concave mirror and convex lens write two uses of concave and convex lens write two uses of concave and convex lenses write two applications of concave and convex lens write two uses of concave mirror and convex lens state two applications of concave and convex lens write two uses of each a concave mirror b convex lens
