Invisibility Cloak, like in Harry Potter, Exists
Researchers at the University of Texas in Austin have created a Harry Potter-like invisibility cloak, which as of now works in microwave light and not in the visible light. However, it provides great hope to the scientists to invent a device that could make a person invisible in broad day light.
The cloak is made of a new kind of material called as metascreen. It used 66 micrometers thick strips of copper tape and 100 micrometers thick flexible polycarbonate films. Both the strips were combined in a diagonal fishnet pattern.
Previously, the invisible cloaks were attempted using a technique that bends the light rays around an object in order to not let them scatter or reflect of the object. But, the new cloak works on the mantle cloaking which cancels the light waves bouncing off the shielded object so that they do not reach the observer's eye.
Study co-author Andrea Alu, a physicist at the University of Texas at Austin, said in a statement, "When the scattered fields from the cloak and the object interfere, they cancel each other out and the overall effect is transparency and invisibility at all angles of observation".
Alu added that mantle cloaking has various advantages over other existing techniques such as conformability, ease of manufacturing and improved bandwidth.
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