Ultraviolet (UV) light is a type of electromagnetic radiation with wavelengths shorter than visible light but longer than X-rays. It is categorized into three types based on wavelength: UVA (320-400 nm), UVB (280-320 nm), and UVC (100-280 nm). While UVA and UVB reach the Earth's surface, UVC is mostly absorbed by the ozone layer and does not naturally reach us.
