30 Aug '15, 8pm

Invisible Drones Could Become Reality with New Meta Material

Invisible Drones Could Become Reality with New Meta Material

Up to now, the main theoretical tool used for designing invisibility cloaks has been transformation optics / conformal mapping – according to Fermat’s principle, an electromagnetic wave will travel between two points along the path of least time. In a homogeneous material, this path is just a straight line. However, in an inhomogeneous material, the path becomes a curve because waves travel at different speeds at different points. Thus, one can control the path of waves by appropriately designing the material parameters (electric permittivity and magnetic permeability).

Full article: http://defense-update.com/20150830_metamaterial_cloak.html

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