Ultraviolet - Wikipedia
WEBUltraviolet (UV) light 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 about 10% of the total electromagnetic radiation output from the Sun.
Radiation: Ultraviolet (UV) radiation - World Health Organization …
WEBMar 9, 2016 · The UV region covers the wavelength range 100-400 nm and is divided into three bands: UVA (315-400 nm) UVB (280-315 nm) UVC (100-280 nm). Short-wavelength UVC is the most damaging type of UV radiation. However, it is completely filtered by the atmosphere and does not reach the earth's surface.
Ultraviolet radiation | Definition, Examples, Effects, Wavelengths ...
WEBAug 6, 2024 · Ultraviolet radiation lies between wavelengths of about 400 nanometres (1 nanometre [nm] is 10 −9 metre) on the visible-light side and about 10 nm on the X-ray side, though some authorities extend the short-wavelength limit to 4 nm.
Ultraviolet (UV) Radiation - Center for Science Education
WEBUV "light" spans a range of wavelengths between about 10 and 400 nanometers. The wavelength of violet light is around 400 nanometers (or 4,000 Å). Ultraviolet radiation oscillates at rates between about 800 terahertz (THz or 10 12 hertz) and 30,000 THz.
Ultraviolet Light or UV Radiation - Science Notes and Projects
WEBApr 1, 2023 · Ultraviolet light or UV is electromagnetic radiation in the wavelength range of 10 to 400 nanometers (nm), which is between x-rays and visible light. Because it is largely invisible to humans, another name for UV is black light.
Ultraviolet Waves - NASA Science
WEBAug 10, 2016 · Ultraviolet (UV) light has shorter wavelengths than visible light. Although UV waves are invisible to the human eye, some insects, such as bumblebees, can see them. This is similar to how a dog can hear the sound of a whistle just outside the hearing range of humans.
UV Light - Stanford Solar Center - Stanford University
WEBUV (Ultraviolet) Light refers to the region of the electromagnetic spectrum between visible light and X-rays, with a wavelength falling between 400 and 10 nanometers.
What Is Ultraviolet Light? - Live Science
WEBSep 15, 2017 · It has frequencies of about 8 × 10 14 to 3 × 10 16 cycles per second, or hertz (Hz), and wavelengths of about 380 nanometers (1.5 × 10 −5 inches) to about 10 nm (4 × 10 −7 inches). According to...
Electromagnetic radiation - UV, Wavelengths, Absorption
WEBSep 13, 2024 · When ultraviolet light strikes certain materials, it causes them to fluoresce—i.e., they emit electromagnetic radiation of lower energy, such as visible light.
What is UV? - Science Learning Hub
WEBThere are a variety of ways we put ultraviolet (UV) radiation to good use – vitamin D production, sterilisation and disinfection, astronomy, fluorescence and lighting, and curing. For more resources related to UV, this article introduces the range of content we have.
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