Question

Lenses are described as convergent or divergent depending on how they refract light. what is the difference between these two types of lenses? based on what you have learned, do you think the cornea and the eye lens act together as a convergent or divergent lens? explain.

Answer 1

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If both surfaces are convex the lens is thicker at its center than its edges. A lens with one surface convex and one concave is called meniscus. Some lenses change the direction of the rays enough to cause the rays in a bundle to emerge convergent, that is, converging toward a common point. Whatever the mix of surfaces, if the lens is thicker at its center than its edges it is called a converging lens (having positive focal length). If it is thinner at its center than its edges it is called diverging (having negative focal length).