BIOLOGICAL APPLICATION A simple model for the eye is a

Chapter , Problem 67

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BIOLOGICAL APPLICATION A simple model for the eye is a lens that has a variable power located a fixed distance in front of a screen, with the space between the lens and the screen filled by air. This eye can focus for all values of object distance such that where the subscriptson the variables refer to near point and far point, respectively. This eye is said to be normal if it can focus on very distant objects. (a) Show that for a normal eye of this type, the required minimum value of is given by (b) Show that the maximum value of is given by (c) The difference between the maximum and minimum powers, symbolized by is defined as and is called the accommodation. Find the minimum power and accommodation for this model eye that has a screen distance of a far point distance of infinity, and a near point distance of

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