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News
Experiment sets the ultimate test for Newton's laws Mar 16
A physicist in Australia has come up with an experiment that could potentially reveal a flaw in Newton's law of gravitation. If the flaw exists, it would be the first evidence in support of theories that explain the movement of galaxies without having to introduce "dark matter" (Phys. Rev. Lett. 98 101101).
Double-negative metamaterial edges towards the visible Mar 16
Researchers in the US have created a metamaterial that has a negative magnetic permeability and negative electric permittivity for infrared light with a wavelength of 813 nm. This is claimed to be the shortest wavelength yet for such a metamaterial and lies just outside of the visible spectrum at 380-780 nm. The previous record had been about 1500 nm, and the result is an important step towards the creation of double-negative negative-index metamaterials (DN-NIMs) that operate in the visible range.
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