What is the difference between a double convex and a bi-convex lens? – InterviewSolution

1.	What is the difference between a double convex and a bi-convex lens?
Answer» In both cases the two surfaces are convex towards air. In case of double convex lens the two surfaces may have any values for the two radii of curvature of the two surfaces while in bi-convex lens the radii of curvature of the two surfaces, has the same value. Thus, every bi-convex lens is a double convex lens about every double convex may not be bi-convex.

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