The optical spectrum refers to the range of electromagnetic radiation that is visible to the human eye, typically spanning wavelengths from about 380 to 750 nanometers. This spectrum includes all the colors of light, from violet at the shortest wavelengths to red at the longest. It plays a crucial role in various fields, including photography, optics, and color science. Beyond visible light, the optical spectrum is part of the larger electromagnetic spectrum, which includes ultraviolet and infrared radiation. Understanding the optical spectrum is essential for applications such as spectroscopy, where scientists analyze light to determine the properties of materials.