Invisibility, one of the aspirations of human beings, that the optics and materials have made it possible today. This is possible using metamaterials. Metamaterials have amazing optical properties, including a negative refractive index, which are not found in nature and must be prepared with special techniques. Normally, the light that hits an opaque object is reflected from it and becomes visible, metamaterials change and transform this two-way relationship between light and objects so that the light changes its direction around the object without being reflected and passes through it. In this case, because no light is visible, the object becomes invisible. . In this article, by using the principles of light physics and explaining the phenomena of light refraction and surface plasmon, general information about how objects become invisible and methods of preparing metamaterials will be presented.
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