- The Islamic State – Khorasan Province (ISIS–K or IS–KP) is a regional branch of the Salafi jihadist group Islamic State (IS) active in South-Central Asia, primarily Afghanistan and Pakistan. ISIS–K seeks to destabilize and replace current governments within historic Khorasan region with the goal of establishing a caliphate across South and Central Asia, governed under a strict interpretation of Islamic sharia law, which they plan to expand beyond the region.
- Light (Wikipedia)
Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz. The visible band sits adjacent to the infrared (with longer wavelengths and lower frequencies) and the ultraviolet (with shorter wavelengths and higher frequencies), called collectively optical radiation.