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  1. 13 Mar 2025

    The lens make formula is mention below: 

    1 f = ( n − 1 ) ( 1 R 1 − 1 R 2 )  ⁠⁠⁠⁠⁠⁠⁠

    where, f is the focal length (half the radius of curvature) n is the refractive index of the material used. R1 is the radius of curvature of sphere 1.

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