The closely packed cones in the fovea of the eye have a diameter of about For the eye to

Chapter 25, Problem 25.20

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The closely packed cones in the fovea of the eye have a diameter of about For the eye to discern two images on the fovea as distinct, assume that the images must be separated by at least one cone that is not excited. If these images are of two point-like objects at the eyes 25-cm near point, how far apart are these barely resolvable objects? Assume the eyes diameter (cornea-to-fovea distance) is 2.0 cm.

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