When browsing through the shelves of a delightful bookstore near my home, I saw a book that was devoted to the science of “Harry Potter”- I’ve seen books on the science of Star Trek, but never Harry Potter, so it was unusual for me to find Michio Kaku’s article, "Small-Scale Invisibility Cloaks".
The whole article sounds like crazy-talk, but is actually true. In 2006, some industrious scientists at Duke University created metamaterials, “which could render an object invisible by absorbing all the light that hits it, but only in two dimensions and only at microwave frequencies”.
Now, very small three-dimensional objects can appear to disappear when under an infrared light if they are placed under an invisibility carpet. According to Kaku, when you put the object underneath the carpet, the bump disappears. He believes that this technology can be applied to larger objects or people as well in the future, which is definitely starting to sound more than a little like Harry Potter. The main reason that the technology is able to work is that infra-red light works at a lower frequency than regular light and has a longer wavelength; when light hits the bump, it bounces off.