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A contact lens is made of plastic with an index of refraction of 1. The lens has an outer radius of curvature of +2.10 cm and an inner radius of...

A contact lens is made of plastic with an index of refraction of 1.60. The lens has an outer radius of curvature of +2.10 cm and an inner radius of curvature of +2.57 cm. What is the focal length of the lens?

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