
Using environments | uv - Astral
May 18, 2025 · uv is an extremely fast Python package and project manager, written in Rust.
Ultraviolet - Wikipedia
Ultraviolet radiation or UV is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight and constitutes …
Ultraviolet Radiation | Radiation and Your Health | CDC
Jul 16, 2025 · Ultraviolet (UV) radiation is a form of non-ionizing radiation that is emitted by the sun and artificial sources, such as tanning beds. While it has some benefits for people, including the creation …
ultraviolet radiation - Encyclopedia Britannica
Dec 18, 2025 · The ozone layer effectively blocks almost all solar radiation of wavelengths less than 290 nm from reaching Earth’s surface, including certain types of ultraviolet (UV) and other forms of …
Ultraviolet (UV) Radiation | FDA
UV rays are strongest in areas close to the equator. Because the sun is directly over the equator, UV rays only travel a short distance through the atmosphere to reach these areas.
Where Does Ultraviolet Light Come From and What Is It Used For?
Jun 19, 2025 · What is ultraviolet light, and where does it come from? Learn how UV radiation is classified, measured, and used in medicine, manufacturing, astronomy, and daily life, plus how to …
Ultraviolet radiation - World Health Organization (WHO)
Jul 24, 2025 · Ultraviolet (UV) radiation covers the wavelength range of 100–400 nm, which is a higher frequency and lower wavelength than visible light. UV radiation comes naturally from the sun, but it …
Live UV Index Today | Hourly Sun Safety Forecast for Your City
Get the most accurate, real-time UV index for any city in the United States. Check the live hourly UV forecast, understand the UV scale with our detailed chart, and get essential sun safety tips to protect …
UV Light - Stanford Solar Center
In cases of long exposure to the Sun's light without protection, a person's risk of skin cancer and other dangerous cellular afflictions greatly increases. The eyes should also be protected from UV radiation …
International Ultraviolet Association Inc - What is UV? - IUVA
What is UV? The following is intended as a valuable introduction to UV (ultraviolet) for newcomers and enthusiasts alike. Ultraviolet light is that portion of the electromagnetic spectrum that lies beyond the …