From The Telegraph:
Only days after American scientists announced they have developed light warping materials suitable for invisibility cloaks, Chinese scientists have devised a way to peer under this cloak.
However, the good news for Harry Potter fans is that the anti -cloaking materials would have to be underneath the invisibility cloak to work. And they could help Harry Potter to improve his vision, as a bonus.
The recipe to undo invisibility comes from a study in the journal Optics Express by Dr Huanyang Chen of Shanghai Jiao Tong University in China.
He and his colleagues have proposed a theoretical "anti-cloak" that would partially cancel the effect of the invisibility cloak, which is another important problem as it turns out.
In recent years, several teams have shown that the mathematics of invisibility makes sense. In the past few weeks, a Californian team has also shown that it is possible to create the special synthetic "metamaterials" to make cloaking materials.
All materials scatter, bounce, absorb, reflect and otherwise alter light rays that strike them.
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