what is a lence? with figure
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A lens is a piece of transparent glass which concentrates or disperses light rays when passes through them by refraction.
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a piece of glass or other transparent material with curved sides for concentrating or dispersing light rays, used singly (as in a magnifying glass) or with other lenses (as in a telescope).
the light-gathering device of a camera, typically containing a group of compound lenses.
Explanation:
A lens is a transmissive optical device which 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, usually arranged along a common axis.
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