brunascle writes "A new theoretical design using nanowires could provide a way to cloak visible light. Advancing on last year's microwave-cloaking breakthrough, the new design is theoretically able to work in the upper end of the visible spectrum, at a wavelength of 632.8 nanometers — visible red light. The researches behind it are calling it the first practical design of its kind to work in the visible spectrum. At around 400 to 700nm, visible light has a much shorter wavelength than microwave, 1mm to 30cm. Because of this, using this technology in the visible spectrum requires components just 40 nanometers in size. The group is now working on an actual device using the theoretical design."