what is the scientific meaning of ultraviolet radiation?
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ultraviolet radiation. Radiation in the part of the electromagnetic spectrum where wavelengths are just shorter than those of ordinary, visible violet light but longer than those of x-rays.
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"Ultraviolet" means "beyond violet" (from Latin ultra, "beyond"), violet being the color of the highest frequencies of visible light. Ultraviolet has a higher frequency (and thus a shorter wavelength) than violet light.
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The term vacuum UV (below ≈ 200 nm) refers to the wavelength range where a vacuum apparatus is often used, because the light is strongly absorbed in air. The vacuum UV includes the far and extreme UV.
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ULTRAVIOLET ASTRONOMY Since the Earth's atmosphere absorbs much of the high-energy ultraviolet radiation, scientists use data from satellites positioned above the atmosphere, in orbit around the Earth, to sense UV radiation coming from our Sun and other astronomical objects.
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Ultraviolet (UV) radiation is a form of electromagnetic radiation that comes from the sun and man-made sources like tanning beds and welding torches. Radiation is the emission (sending out) of energy from any source.
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Ultraviolet (UV) light falls in the range of the EM spectrum between visible light and X-rays. It has frequencies of about 8 × 1014 to 3 × 1016 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).
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1 Answer. Oscar L. The range of wavelengths given define ultraviolet radiation.
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Photochemistry is the branch of chemistry concerned with the chemical effects of light. Generally, this term is used to describe a chemical reaction caused by absorption of ultraviolet (wavelength from 100 to 400 nm), visible light (400–750 nm) or infrared radiation (750–2500 nm).
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Ultraviolet radiation, that portion of the electromagnetic spectrum extending from the violet, or short-wavelength, end of the visible light range to the X-ray region.
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The UV Index represents the amount of skin-damaging UV radiation reaching the earth's surface at any instant of time. The basic UV Index forecast is given for solar noon — the sun's highest point in the sky and the time of the highest fluctuation in UV radiation (under clear sky conditions).
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Extreme ultraviolet radiation (EUV or XUV) or high-energy ultraviolet radiation is electromagnetic radiation in the part of the electromagnetic spectrum spanning wavelengths from 124 nm down to 10 nm, and therefore (by the Planck–Einstein equation) having photons with energies from 10 eV up to 124 eV (corresponding to ...
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Ultraviolet radiation - UV - is found naturally in sunlight. We cannot see or feel ultraviolet radiation, but our skin responds to UV exposure by turning darker over time. This is called a sun tan.
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Ultraviolet radiation is the most common form of radiation which is used in photolithography. Due to the most common use of ultraviolet radiation photolithography is also commonly called as UV lithography. Photolithography is a process used in microfabrication to pattern parts of a thin film or the bulk of a substrate.
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Ultraviolet radiation is produced by high-temperature surfaces, such as the Sun, in a continuous spectrum and by atomic excitation in a gaseous discharge tube as a discrete spectrum of wavelengths.
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UV is deadly to most forms of life. Of the three types of Ultraviolet radiation, UVA is most common and has the lowest energy.
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UV radiation is part of the natural energy produced by the sun. On the electromagnetic spectrum, UV light has shorter wavelengths than visible light, so your eyes can't see UV, but your skin can feel it. Tanning beds also emit UV radiation.
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Ultraviolet astronomy is also best done from space. Electromagnetic radiation with wavelengths between roughly 400 and 700 nm is called visible light because these are the waves that human vision can perceive. This is also the band of the electromagnetic spectrum that most readily reaches Earth's surface.