what is the ultraviolet range?
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Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 nm (with a corresponding frequency of approximately 30 PHz) to 400 nm (750 THz), shorter than that of visible light but longer than X-rays.
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UV light that has wavelengths longer than 200 nm passes through liquid water, while shorter wavelengths are strongly absorbed by liquid water. ... Note that both UVA (320-400 nm) and UVB (290 to 320 nm) are above the 200 nm drop, and are not highly absorbed by water.
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The color components of visible light include violet, blue, green, yellow to orange, bright red and dark red. The full range of visible light wavelength stretches from about 340 nanometers to around 750 nanometers. Light in the range of 340 to 400 nanometers is near ultraviolet (UV), mostly invisible to human eyes.
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The UV Index provides a daily forecast of the expected risk of overexposure to the sun. The Index predicts UV intensity levels on a scale of 0 to 10+, where 0 indicates a minimal risk of overexposure and 10+ means a very high risk.
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By definition, ultraviolet light is 'beyond violet light' and the visible spectrum that can be detected by the human eye. It cannot, therefore, be seen directly. Detectors that are sensitive to UV convert it into a form that we can see.
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From Wikipedia, the free encyclopedia. The ultraviolet index, or UV Index, is an international standard measurement of the strength of sunburn-producing ultraviolet (UV) radiation at a particular place and time.
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Portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye. Electromagnetic radiation in this range of wavelengths is called visible light. A typical human eye will respond to wavelengths from about 390 to 750 nm.
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Visible light has a wavelength range from ~400 nm to ~700 nm. Violet light has a wavelength of ~400 nm, and a frequency of ~7.5*1014 Hz. Red light has a wavelength of ~700 nm, and a frequency of ~4.3*1014 Hz. Visible light makes up just a small part of the full electromagnetic spectrum.
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In this sense, we are referring to visible light, a small spectrum from the enormous range of frequencies of electromagnetic radiation. This visible light region consists of a spectrum of wavelengths that range from approximately 700 nanometers (abbreviated nm) to approximately 400 nm.
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Both are types of electromagnetic radiation only visible light is at a frequency that the human eye can detect while ultraviolet light is at a frequency that's just beyond what the human eye can detect. Since UVL has a higher frequency, that means it's at a greater energy state.
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While IR represents electromagnetic radiation with wavelengths longer than those of visible light, UV represents wavelengths shorter than visible light. ... The UV radiation, on the other hand, covers the wavelength range of 400 nm (violet edge) to 10 nm.
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Definition of ultraviolet. 1 : situated beyond the visible spectrum at its violet end —used of radiation having a wavelength shorter than wavelengths of visible light and longer than those of X-rays. 2 : relating to, producing, or employing ultraviolet radiation.
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The bottom line About 95 percent of the UV rays that reach the ground are UVA rays. The other 5 percent of UV rays are UVB.
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Ultraviolet (UV) radiation is defined as that portion of the electromagnetic spectrum between x rays and visible light, i.e., between 40 and 400 nm (30–3 eV). ... UVC is almost never observed in nature because it is absorbed completely in the atmosphere, as are Far UV and Vacuum UV.
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ultraviolet. Use the adjective ultraviolet to describe light with a wavelength that's less than visible light, but longer than x-rays. ... The word itself, ultraviolet, refers to the fact that its wavelength is shorter than the violet end of the spectrum of visible light. The Latin prefix ultra means "beyond."
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Although black lights produce light in the UV range, their spectrum is mostly confined to the longwave UVA region, that is, UV radiation nearest in wavelength to visible light, with low frequency and therefore relatively low energy. While low, there is still some power of a conventional black light in the UVB range.
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Part of that sunlight is known as ultraviolet light (UV). UV is a light that is invisible because its wavelength is shorter than the violet part of the sunlight spectrum. ... UVC light has a wavelength of 280-10 nanometers and is filtered out by the Earth's outer atmosphere.