An achromatic objective of focal length 1.5m is to be constructed with a crown glass convex lens `(mu=1.51 omega=0.21)` and a flint glass concave lens `(mu=1.65 omega=0.45)` One face of the concave lense is in complete contact with the convex lens and the other face is plane. Calculate the curvatures of the surfaces.

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1.	An achromatic objective of focal length 1.5m is to be constructed with a crown glass convex lens `(mu=1.51, omega=0.21)` and a flint glass concave lens `(mu=1.65, omega=0.45)` One face of the concave lense is in complete contact with the convex lens and the other face is plane. Calculate the curvatures of the surfaces.
Answer» Correct Answer - 0.18m (convergent)

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