} }

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cee
Hi
What is concavo convex lens?
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cee
A concavo-convex lens is a lens in which one surface of the lens is convex and the other is concave. The convex face has a smaller curvature than the concave face so that the former tends constantly away from the latter.
cee
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What do we call the lens having one surface as convex and the other as concave?
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