og_shift8 - Slashdot User

Comment Re:Not your grandfather's Hi-Fi (Score 2, Informative) 172

by og_shift8 on Wednesday July 18, 2007 @09:10PM (#19909217) Attached to: Making Old Sound Recordings Audible Again

looks like 3d noise reduction is done in the image domain - not in the audio.

Material With Negative Refractive Index Created 210

Posted by kdawson on Monday December 18, 2006 @04:57PM from the seeing-right-through-it dept.

holy_calamity writes "The race to build a material with a negative index of refraction for visible light has been won by researchers in Germany. The advance could lead to super-lenses able to see details finer then the wavelength of visible light, or the previously predicted invisibility cloak for visible light." From the article: "[The researcher] determined the refractive index of the material by measuring the 'phase velocity' of light as it passed through. His measurements show the structure has a negative refractive index of -0.6 for light with a wavelength of 780 nm [the far red end of the visible light spectrum]. This value drops to zero at 760 nm and 800 nm, and becomes positive at longer and shorter wavelengths."

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