Metamaterial Cloak and Negative Refraction

A metamaterial cloak has demonstrated invisibility in the radar spectrum by bending light around the object using ring patterns of specific sizes relative to the wavelengths. Another interesting property is negative refraction which could make microscopes more powerful then the current limitations among other things. The research is proving the usefulness of metamaterials  although it is not made precisely yet. This video is a lecture from a leading researcher in the field.

Photograph of the metamaterial lattice used to...

Photograph of the metamaterial lattice used to demonstrate negative refraction. The array of square split-ring resonators gives the material a negative magnetic permeability, whereas the array of straight wires gives it a negative permittivity (Photo credit: Wikipedia)

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