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Nature 423, 22-23 (1 May 2003) | doi:10.1038/423022a
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Optics: Positively negative
John Pendry
Abstract
An artificially created material with negative refractive index has opened the door to new phenomena — and controversy. New work finally sets the seal of experimental confirmation on negative refraction.
As light crosses a boundary between different materials (such as between air and water), its speed changes and it refracts, or bends. On entering most materials, light refracts with a positive angle, as shown in Fig. 1
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