Coherent light is the electromagnetic radiation that exhibits synchronization in both the spatial and temporal domains. This synchronization is characterized by the waves shining in the same direction, swinging at the same level, and having the same phase. As a result, coherent light consists of a single-color light with a specific wavelength. The key characteristic of coherent light is its ability to maintain a fixed relationship between descriptive parameters such as frequency, polarization, and phase within a specific spatial and temporal context. This synchronization allows the waves to reinforce each other, resulting in a more focused and powerful light output.