Do you want an invisibility cloak?

Invisible Man; Scenery Image by Geograph.org.uk
What do you do if you had an invisibility cloak? Maybe an I-pad from the show-off friend steal or more ambitious, building an army of invisible soldiers and rule the world? If they are not visible, the possibilities are endless. But such an Invisibility Cloak is scientifically possible? Answer is Yes. Using a special type of substance called Metamaterials, science can do, using a technique called metamaterial cloaking.

Metamaterials are artificial repeating fabric pattern of microscopic materials such as metal or plastic, to a specific pattern or shape, with acute structures similar to developed, maintain the natural substances not found. Through the combination of copper and gold in a specific pattern and form, so a metamaterial formed can help get combined properties of both metals. Mind you, this is no alloy, Metamaterials require a complicated structural design and a smaller size as the wavelength of light, so that they can pass undetected through electromagnetic waves.

Theoretically Metamaterials can undetected by light and other electromagnetic waves, David Smith of Duke University explains, such as:

Imagine a fabric woven of threads. In this fabric only light can flow across the threads (meaning that it can go into the nooks and crannies between the threads). When a hole in the fabric with a PIN punch, light around the hole to go and continue its original course of travel, since light only from the thread can travel. So, the light waves the hole does not exist. When you insert an object into the hole, the light waves would also go, the object rendering around the object effectively invisible.

This principle use, Metamaterials are currently used to make a particular aircraft, radar, visible, through the manipulation of the microwaves emitted by the radar. This is useful, military technology, as an army aircraft, whether with a perfect metamaterial shielded enemy security can pass undetected.

Develop a metamaterial cloak to someone invisible to the naked eye however is a much difficult task, as light waves smaller than micro-waves, and thus the metamaterial will have wavelengths even is small, have that is (currently) not only technically impossible and very expensive, but further research.  In addition an invisibility cloak bar light from entering the metamaterial would vagina, completely, which means that not the person wearing it can see nothing. Scientists hope these problems to a Harry Potter Camo Cape nearfuture make actually possible to solve. The DARPA promotes such research activities to coat personnel of the U.S. Army, a difficult challenge, to say the least.

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