UV radiation refers to ultraviolet radiation, which is a form of electromagnetic radiation that is emitted by the sun. UV radiation is divided into three categories based on wavelength: UVA, UVB, and UVC. UVA radiation has the longest wavelength, while UVC radiation has the shortest. UV radiation has both harmful and beneficial effects. It can cause skin damage, eye damage, and contribute to the development of skin cancer. However, UV radiation also plays a crucial role in the formation of vitamin D in the skin and has been used in medical treatments such as phototherapy for certain skin conditions. Research in the area of UV radiation focuses on understanding its effects on human health, developing technologies for protection against UV exposure, and studying the impact of UV radiation on the environment. This research is important for informing public health guidelines, developing new sunscreen formulations, and mitigating the effects of UV radiation on ecosystems.