Poblem a prescription for a corrective lens calls for , Ask an Expert

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Problem: A prescription for a corrective lens calls for + 3.50D. The lens maker grinds the lens from a "blank" with n = 1.56 and a preformed convex front surface of radius of curvature of 31.0cm.

Part A: What should be the radius of the curvature of the other surface?

I need help to find the radius of the curvature of the other surface.

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