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convex


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Curving outwards. A convex mirror is one in which the reflecting surface is formed from the exterior surface of a sphere or paraboloid. A convex lens has at least one face formed from the exterior surface of a sphere. A biconvex lens has both faces convex and is therefore thickest at its centre. The plano-convex lens has one plane face and one convex face. The convexo-concave lens (also called a meniscus) has one convex face and one concave face. See lens.

Subjects: Physics.


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