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physics

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The nearpoint of an eye is 123 cm. A corrective lens is to be used to allow this eye to clearly focus on objects 25 cm in front of it.
What should be the focal point of this lens?

  • physics -

    B)
    What is the power of the needed corrective
    lens?

  • physics -

    A prescription for a corrective lens calls for +2.50 D. The lensmaker grinds the lens from a “blank” with n=1.56 and a performed convex front surface of radius of curvature of 20.0 cm. What should be the radius of curvature of the other surface

  • physics -

    A prescription for a corrective lens calls for +2.50 D. The lensmaker grinds the lens from a “blank” with n=1.56 and a performed convex front surface of radius of curvature of 20.0 cm. What should be the radius of curvature of the other surface?

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