Jul 21, 2021 · The Sun. Sunlight is the main source of UV radiation on Earth. Of the sun’s UV radiation, 95% comprises UVA rays, and the remaining 5% consists of UVB rays. Due to variations in the Earth’s structure and climate, different areas of the Earth are subjected to more intense UV radiation at different times. In particular, UV radiation is Opinion on Biological effects of ultraviolet radiation relevant to health with particular reference to sun beds for cosmetic purposes 3 1. BACKGROUND The main source of exposure to ultraviolet radiation (UVR) is the sun, but for some individuals substantial exposure occurs from artificial sources including sunbeds for cosmetic purposes, Jun 19, 2013 · Introduction. According to a survey carried out by the European Agency for Safety and Health at Work (EU -OSHA), exposure to ultraviolet radiation (UVR) is one of the most important health risks for workers [1]. This concerns both outdoor workers exposed to solar UVR and indoor workers exposed to artificial sources of UVR. Oct 11, 2023 · Sources of UV Light. UV light comes from a variety of sources, both natural and artificial. Natural Sources of UV Light: The sun: The sun is the most abundant source of UV light on Earth. It emits all three types of UV rays: UVA, UVB, and UVC. However, most of the UVC rays are absorbed by the Earth's atmosphere, so they do not reach the ground. Apr 26, 2018 · UV Light in Chemistry. Scientists use UV light to analyze the chemical structure of a compound via color changes. A machine called a spectrophotometer, which is much more sensitive to color than the human eye, passes a beam of UV light through a solution and shows how much of the radiation is absorbed by the compound using color changes. Ultra-violet Radiation. Ultraviolet (UV) is the electromagnetic radiation covering the range 100 to 400 nm. It is commonly divided into 3 ranges of varying wavelength: The direct potential radiation hazard to health arises from UV with wavelengths greater than 180 nm. UV at lower wavelength is readily absorbed in air and only exists in a vacuum. .

artificial sources of uv radiation