Optical science concerns the genesis and propagation of light, the changes it undergoes, and other phenomena associated with the electromagnetic mode. According to the excerpts from statutes of the International Commission for Optics (ICO), optics is the field of science and engineering encompassing the physical phenomena and technologies associated with the generation, transmission, manipulation, detection, and utilization of light. It extends on both sides of the visible part of the electromagnetic spectrum as far as the same concepts apply.