Whether beings, indiscernible a human eye, or the devices making us invisible are possible in our reality? Scientists ask not one year these questions, but still did not come to definite answer. However developments in the field of technology of invisibility are actively conducted, since eightieth years of the 20th century. And today by means of theoretical models the scientists can show how to create something invisible that then to find it.
Instruction
1. Come into optical contact. The invisibility (impossibility to see something with the naked eye) is not absolutely scientific term, and it is rather an adaptation of a number of scientific concepts for laymen. Speaking to language of physicists, the invisibility is a lack of optical contact. Therefore, visibility of objects — a possibility of visual perception, and it results from reflection (refraction) of light. And if the subject or color is not visible in the range which distinguishes a human eye, then it can be found by means of the special technical devices expanding a sight range. Temperature sensors of the movement, optics with an opportunity to see in ultraviolet or by means of x-ray emission - examples of such devices there can be a set.
2. Put the masking device out of action. The person cannot be invisible by definition, he can only use a camouflage from so-called ""clever"" fabric which adapts to lighting and color of a landscape as a chameleon. Besides, there are (in the form of theoretical models, and it is possible, and in the form of secret military developments) special gadgets which temporarily ""switch off"" an object from a viewing field of a human eye and even do it unavailable to electromagnetic radiation. The most known development creating optical illusion is an interactive board which closes an object and broadcasts the image of a background behind an object. Scientists design not only speculative models of the masking cocoons, but also analyze how it is possible to destroy them.
3. Find signs of material presence of the invisible being. Herbert Wells wrote in the novel ""Invisible man"" that all bodies either absorb light, or reflect, or refract it, or, maybe, all together. Proceeding from this point of view a piece of glass for the scuba diver - an invisible subject. It is impossible to determine its area by eye. But if to use the ekholokatsionny equipment (special radars if it is about moving objects), then the problem will be solved for several seconds. Invisible non-material does not mean yet.