Ultraviolet (UV) radiation is a type of electromagnetic radiation that comes from the sun and artificial sources like tanning beds. It is divided into three types: UVA, UVB, and UVC. UVA has the longest wavelength, followed by UVB, and UVC has the shortest. While UVC is mostly absorbed by the Earth's atmosphere and does not reach the ground, UVA and UVB penetrate the atmosphere and affect us directly.
