What are lenses? Explain their types with diagram.
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A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis.A lens can focus light to form an image, unlike a prism, which refracts light without focusing. There are two types of lensesconvex and concave. Convex lenses are lenses that curve outwards, they converge parallel light rays to a focal point. Concave lenses are thinner in the middle and thicker at their edges
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A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. ...
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