wajlp918
@wajlp918 Activ Acum 4 luni, o săptămână
optical lens
lens, in optics, piece of glass or other transparent substance that is used to form an image of an object by focusing rays of light from the object. A lens is a piece of transparent material, usually circular in shape, with two polished surfaces, either or both of which is curved and may be either convex (bulging) or concave […] Vezi
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