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Optics The equation
sometimes called a lens-maker’s equation, gives the relationship between the focal length f of a thin lens, the distance p of the object from the lens, and the distance q of its image from the lens. We can think of the eye as an optical system in which the ciliary muscle constantly adjusts the curvature of the cornea-lens system to focus the image on the retina. Assume that the distance from the cornea to the retina is 2.5 cm, as shown in the figure below.
- a. Find the focal length of the cornea-lens system if an object located 50 cm away is to be focused on the retina.
- b. What is the rate of change of the focal length with respect to the distance of the object when the object is 50 cm away?
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Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach
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