BASKING IN THE sun has been considered a health hazard for at least four decades. The main risk comes from ultraviolet (UV) light, which the Sun emits alongside visible radiation. This can increase ...

Banner image: UV light being emitted by a krypton chloride excimer lamp, fueled by molecules moving between different states of energy. (Credit: Linden Research Group) A specific wavelength of ...

A bus being treated with ultraviolet light in Shanghai, China. Although types of UV light are already in use to decontaminate vehicles and indoor spaces, the wavelengths used are dangerous to people.

We first heard about the disinfecting powers of UV-C light (ultraviolet light with a wavelength between 200 and 280 nanometers — and the same light that causes sunburn and skin-cell mutation in humans ...