Lights are forms of electromagnetic radiation that are visible to the human eye. They are produced by various sources, such as the sun, light bulbs, and flames. The visible spectrum of light ranges from violet to red, with each color corresponding to different wavelengths. In addition to visible light, there are other types of electromagnetic radiation, including ultraviolet light and infrared light, which are not visible to humans. Light plays a crucial role in many processes, such as photosynthesis in plants and the ability of humans to see their surroundings.