High Quality Content by WIKIPEDIA articles! Transformation optics represents an advancement in the design of optical devices. It is the basis for conceptualizing complex tools in the electromagnetic regime which allows for novel control of light, also known as electromagnetic waves. The mathematics underpinning transformation optics is similar to the equations that describe how gravity warps space and time, in General Relativity. However, instead of space and time, these equations show how light can be directed in a chosen manner, analogous to warping space. For example, one potential application is collecting sunlight with novel solar cells by concentrating the light in one area. Hence, a wide array of conventional devices could be markedly enhanced by the transformation optical approach. Complex artificial materials, known as metamaterials, are part of this science`s tool bag.