UV, or ultra-violet, refers to the portion of the electromagnetic spectrum with wavelengths below 390nm. This light is invisible to the human eye but can affect photographic materials, contributing to haze, colour shifts, or unique imaging effects.
Photographers working with UV light need to understand its impact on film and digital sensors, particularly for outdoor, landscape, or scientific photography. Using UV filters or specialised equipment can help control its effects and produce accurate, high-quality images.