Most of you have seen the movie Harry Potter. Remember when he uses an invisibility cloak to find a book in the restricted section?
This could actually become reality. I'm not saying it's here and ready to buy, but it could happen soon in the future.
In nature, light always refracts in one direction. This makes it hard for someone to pick up an object that is underwater while looking at it from above the water.
Researchers have been able to create a metamaterial, one which bends some wavelengths of lights causing them to refract in the opposite direction.
Now, here comes the part of the future. If scientists were able to bend a wide range of wavelengths, then they could control the way the light moves. This material combined with other optical materials could result in a lens with very, very little distortion- and an invisibility cloak that would bend light around the object, so the observer will not be able to see it.
Listen to the Science Friday August 15, 2008 Podcast for more info.
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