Invisible light that contains more energy per unit of light than visible light. Ultraviolet light can cause mutation and cell death by damaging DNA.
Radiation (light) having a wavelength shorter than 3900 angstroms the wavelengths of visible light, and longer than 100 angstroms, the wavelengths of x-ray's. This wavelength puts ultraviolet light at the invisible violet end of the light spectrum. Ultraviolet light is used as a disinfectant.
Radiation beyond the visible spectrum in the violet end of the spectrum. Wavelengths in this spectrum are shorter than those of visible light and longer than those of X-Rays.
Light that is invisible to the naked eye because it consists of wavelengths shorter than those of visible light.
a form of invisible light in sunlight that is responsible for the tanning and burning of skin and can cause cataracts and skin cancer
invisible radiation or light just beyond violet in the visible spectrum
Invisible rays at the extreme violet end of the sun's light spectrum, which causes color fading and deterioration of certain materials, such as plastics. Most pond liners have chemical additives to inhibit the effects of UV rays.
Light that is just beyond violet on the visible spectrum.
Ultraviolet (UV) light is part of the light spectrum. UV light wavelengths cannot be seen by the human eye.
See Ultraviolet radiation.
a specific wavelength of sunlight that damages skin and causes skin cancer
Type of electromagnetic radiation which cannot be seen by humans. Ultraviolet, often abbreviated U.V. is term used when referring to ultraviolet light. Ultraviolet Lamp (U.V. lamp) is one that gives off ultraviolet light while blocking out white light, which causes fluorescent minerals to react.
Light with wavelength shorter than visible light, but longer than X-rays.
light waves shorter than the visible blue violet waves of the spectrum. Crude oil, colored distillates, residuum, a few drilling fluid additives, and certain minerals and chemicals fluoresce in the presence of ultraviolet light. These substances, when present in mud, may cause the mud to fluoresce.
Light whose wavelength is too short to lie within the visible spectrum.
Light with very short wavelenghths, out of the visible spectrum.
Light lying just beyond the violet end of the visible spectrum and having wavelengths shorter than approximately 4,000 angstroms. (Course Material/PenetrantTest/Introduction/history.htm)
The energy output by a source which is of shorter wavelengths than the eye can see. Some photographic films are sensitive to ultraviolet energy, as are many electronic detectors. "Black Light."
part of the electromagnetic spectrum found between the violet side of visible light and x-rays.
THIS IS ELECTROMAGNETIC ENERGY EMITTED BY THE SUN, MEASURED BY IT'S WAVELENGTH, EXPRESSED IN NANOMETERS. A NANOMETER = 1 BILLIONTH OF A METER (39.37 INCHES). ULTRAVIOLET LIGHT IS NOT VISIBLE LIGHT; IT RANGES FROM 300 TO ABOUT 380 NANOMETERS. OUR EYES CAN ONLY DETECT LIGHT FROM 380 NANOMETERS TO 760 NANOMETERS. THE SHORTER THE WAVELENGTH, THE MORE ENERGY IS DELIVERED. THIS IS WHY ULTRAVIOLET LIGHT CAN DAMAGE PAINT FINISHES, CARPETS AND FURNITURE FABRICS. IT IS REFERRED TO AS UV.
the short-wave limit of visible light, with a waver length range of 4-400 nanometers. (Nano meaning milli-micro.)
The portion of the electromagnetic spectrum from about 5 - 400 nanometers; this is the form of light responsible for a suntan.
Ultraviolet light is a form of radiation which is not visible to the human eye. It is sometimes used for irradiation of produce to eliminate disease pathogens.
Energy of shorter wavelength than visible light. Ultraviolet light from the sun is responsible for much paint film deterioration on exterior exposure. It also activates fluorescent paints.
invisible radiation beyond the violet end (or band) of the visible light spectrum.
radiation having wavelengths shorter than the visible spectrum but longer than X-rays (~1-400nm)
High energy light that is not visible to humans. Back to text
Radiation in the electromagnetic spectrum with wavelengths of 100 - 3900 Ångstroms
The part of the electromagnetic spectrum between 200 and 400 nanometers in wavelength.
Wavelengths of light that are slightly shorter than visible light waves on the violet end of the light spectrum. There are different forms of ultraviolet light, but when referring to iguanas, the term is usually used in reference to ultraviolet B ( UVB). In iguanas, UVB triggers chemical reactions in the skin which lead to the formation of vitamin D3 (see below), which is used by the body to properly absorb calcium from the blood. Ultraviolet light is an essential part of an iguana's environment, and can be obtained from unfiltered sunlight or artificial UV bulbs. For more information on the importance of ultraviolet light, see the Habitat page.
Light rays beyond the visible light spectrum with the capability of producing photobiological effects on the skin.
short wavelength light that is beyond the visible spectrum at the violet end; rays of light that are invisible to the human eye but can damage objects
that portion of sunlight ranging in wavelength from 200 to 400 nanometers. Wavelengths below 300 nanometers do not pass through the atmosphere in appreciable amounts.
invisible rays or waves released by the sun that can have potentially harmful effects on plant and animal life
The non-visible portion of the light spectrum with a wave length shorter than violet light.
Region of the electromagnetic spectrum spanning wavelengths from 91.2 nm to 350 nm, wavelengths largely blocked by the Earth's atmosphere.
Ultraviolet is a high energy, short wavelength of light. It is shorter than violet in the visible spectrum and on the border of the x-ray region.
an invisible form of light which can cause sunburn and which is effective in killing microorganisms.
An invisible part of the spectrum ranging from 185 to 450 nanometers. Ultraviolet light is the prime cause of pigment failure (or fading) in some inks, paints, and substrates, especially red.
The type of light that emanates directly from the sun. It is classified into three categories according to wavelength: UVC, UVB, and UVA. Ultraviolet light can also be simulated using light panels and light boxes. This is a popular treatment for psoriasis.
Those light waves emitted by sunlight and fluorescent light and not part of the visible spectrum but which are very damaging to art. See Conservation Framing.
light beyond the visible spectrum. Two different ultraviolet (UV) wave lengths are used to detect luminescence. Long wave is used to detect fluorescent items. Short wave is used to detect phosphor tagged items.
Energy produced by the (invisible) part of the electromagnetic spectrum with wavelengths of 100 to 400 nanorneters. Popularly known as "black light." UV radiation produces fluorescence in many materials.
Light with very short wavelengths, out of the visible spectrum.
radiation with a wavelength shorter than violet light and with more energy. It is invisible to humans, but the increased energy can result in damaged tissues.
Short, high energy invisible light waves beyond violet in the spectrum with a length of 250 to 400 nanometers.
The invisible rays that are outside the visible spectrum at its short wavelength violet end. Ultraviolet rays are found in everyday sunlight and can cause fading of paint finishes, carpets, and fabrics.
radiation having a wavelength shorter than wavelengths of visible light and longer than those of x-rays
Light having a shorter wavelength and higher energy than visible light. Ultraviolet light is potentially damaging to library, archive and museum objects. Removing UV light can reduce the rate of deterioration. Certain acrylic sheets have UV filtering chemicals built into them.
A light used in conjunction with a fluorescent dye to detect leaks in the engine, transmission or cooling system.
A form of luminous energy occupying a position in the spectrum of sunlight beyond the violet, and having wavelengths that do not enter the visible spectrum. UV rays accelerate deterioration of roof materials. Hence, the need for protective coatings.
Electromagnetic radiation with a wavelength shorter than that of visible light.
electromagnetic waves with a wavelength of 10 to 700 nanometers. See also near ultraviolet light, mid ultraviolet light and deep ultraviolet light.
A portion of the light spectrum not visible to the eye. Two bands of the UV spectrum, UVA and UVB, are used to treat Vitiligo and Psoriasis.
radiation of an energy range than that of visible light but lower than that of ionising radiations such as X-rays. Many substances absorb ultraviolet light, leading to electronic excitation. [This process is useful both as a means for characterising materials and for stimulating chemical reactions (photochemical reactions.)
Part of the light spectrum. Ultraviolet rays can cause chemical changes in rubbery materials.
Radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays.
UV is present in sunlight and is necessary for maintaining adequate levels of active vitamin D in box turtles
the light that is above the blue/violet end of the visible spectrum; the wavelengths of UV light are smaller (and thus have a higher frequency) than that of infrared and visible light; wavelengths range from 1.0 to 400 nm.
The name of the invisible portion o fhte light specturm with wavelengths shorter than 390 nanometers. The damaging effects on long-term UV exposure results in fabric fading and plastic deterioration.
The range of light wavelengths above the violet which is between the visible spectrum and the invisible x-ray spectrum. Ultraviolet radiation can be damaging.
Invisible rays of solar radiation at the short-wavelength violet end of the spectrum. Ultraviolet rays can cause fading of paint finishes, carpets, and fabrics, as well as deterioration of some materials.
Light that is shorter in wavelength and higher in frequency than visible violet light.
Radiant energy with wave lengths slightly shorter than the visible spectrum. Found in sunlight, causes color fading.
light beyond the visible spectrum used to detect luminescence. Long wave ultraviolet light is commonly used to detect fluorescent brighteners, while short wave is used to detect phosphor tagging.