Ultraviolet (UV) light is a type of electromagnetic radiation with wavelengths shorter than visible light but longer than X-rays. UV light is categorized into three main types: UVA (long-wave), UVB (medium-wave), and UVC (short-wave). UV light is present in sunlight and can also be produced artificially by sources such as black lights, tanning beds, and UV lamps. Research in the area of ultraviolet light focuses on understanding its effects on living organisms, materials, and the environment. UV light has both beneficial and harmful effects. It plays a crucial role in the production of vitamin D in humans and helps in water purification and disinfection. However, overexposure to UV light can cause skin damage, eye damage, and increase the risk of developing skin cancer. Scientists study the mechanisms of action of UV light, its interactions with various compounds, and ways to protect against its harmful effects. This research has applications in fields such as medicine, dermatology, photobiology, environmental science, and materials science. UV light is also used in technologies such as UV sterilization, UV curing, and UV spectroscopy.