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A superlens, or super lens, is a lens which uses metamaterials to go beyond the diffraction limit. The diffraction limit is a feature of conventional lenses and microscopes that limits the fineness of their resolution depending on the illumination wavelength and the numerical aperture (NA) of the objective lens. Many lens designs have been ...
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The Portuguese Wikipedia (Portuguese: Wikipédia em português) is the Portuguese-language edition of Wikipedia (written Wikipédia, in Portuguese), the free encyclopedia. It was started on 11 May 2001. [2] Wikipedia is the nineteenth most accessed website in Brazil [3] and the tenth most accessed in Portugal. [4]
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