Invisibility Cloak Hides Objects Visible To The Naked Eye
Some years ago scientists managed to build a rudimentary invisibility cloak, which was an impressive device but it had some important limitations, not least of which was that it worked only for a single frequency of microwaves.
One of the biggest questions that physicists have puzzled over since then is whether it is possible to build cloaking device that works over the range of frequencies visible to the human eye.






















