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CONVEX LENS
Convex or converging lens: It is thicker at the center than at the edges.It converges a parallel beam of light on refraction through it.It has a real focus.

Types of convex lenses :
(a) Double convex or biconvex lens : Both the surfaces are convex.It is simply called a convex lens.
(b)Planoconvex lens : One surface is convex and the other is plane.
(c)Concavoconvex : One surface is convex and the other is concave.


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