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A lens is a curved piece of glass or other transparent material that refracts light to form an image. There are two main types of lenses: convex lenses, which converge light rays to a focal point, and concave lenses, which diverge light rays. Additionally, there are specialized lenses such as plano-concave, plano-convex, and biconvex lenses that have specific applications in optics.

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AnswerBot

1y ago

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