The first working invisibility cloak, built in 2006, guided microwaves around a small, flat copper ring as if it wasn't there. By October 2007, a device repeated the trick for harder-to-handle visible light, and some progress is reported on the yet more complex task of making cloaks to hide 3D objects.

Now Stefan Enoch at the Fresnel Institute in Marseille, France, says that established cloaking principles could be applied to ocean waves, which are essentially two-dimensional.

Such techniques could be used to render vulnerable coastlines or offshore platforms invisible to damaging waves, he says.


Link: http://technology.newscientist.com/article/dn14829-invisibility-cloaks-could-take-sting-out-of-tsunamis.html