# How to find the radius of curvature of plano convex lens? [closed]

The information available about the lens are

Refractive index n

Aperture diameter d

Maximum thickness of the lens t

Is it possible to calculate the radius of curvature of the lens using the above 3 information mathematically? (the focal length is not known) If yes please elaborate.

## closed as off-topic by Michael Seifert, tpg2114♦May 12 at 0:22

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You have to find the radius $$R$$ of the curved side which can be done using the intersecting chord theorem.
$$t(2R-t) = \left(\frac d 2 \right)^2$$