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Chapter 35: Lenses

A lens is essentially a medium with a different index of refraction than the surrounding medium. The shape and index of refraction of the lens determine its properties. The key to designing optical systems is understanding the image formed by a given lens or combination of lenses. In this chapter many of the concepts of image formation are similar to those for spherical mirrors. The problems you will encounter will use ray diagrams to explore image formation, determine focal points, and develop methods for understanding multiple-lens systems.

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