The light spectrum refers to the range of electromagnetic radiation that is visible to the human eye, typically spanning wavelengths from about 400 to 700 nanometers. This spectrum includes various colors, such as violet, blue, green, yellow, orange, and red, which can be seen in a rainbow or when light passes through a prism. Beyond the visible spectrum, there are other types of electromagnetic waves, including ultraviolet light, infrared radiation, and radio waves. Each type of wave has different properties and uses, such as ultraviolet light for sterilization and infrared radiation for thermal imaging.