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Glassware
Combustion Boat
Combustion Boats are used in laboratories for chemical analysis. … The surface of porcelain combustion boats are glazed all over with the exception of outside bottom. The bottom of a combustion boat is generally flat that allows it to firmly placed on a planar surface.
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Glassware
Concave & Convex Lens
A convex lens is thicker at the center than at the edges.Rays of light that pass through the lens are brought closer together (they converge). A convex lens is a converging lens. When parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.
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