Uv penetration of water

Light in the ocean is like light in no other place on Earth. It is a world that is visibly different from our familiar terrestrial world, and one that marine animals, plants, and microbes are adapted to in extraordinary ways. Light behaves very differently when it moves from air into water. It moves through the expansive depths of an ocean that is devoid of solid surfaces. These and other factors combine to create an environment that has no equivalent on land. A scuba diver in the open ocean discovers she is immersed not only in water, but also in an ethereal blue light.
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Ultraviolet Radiation

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Ultraviolet Radiation : OSH Answers

It is also produced by electric arcs and specialized lights, such as mercury-vapor lamps , tanning lamps , and black lights. Although long-wavelength ultraviolet is not considered an ionizing radiation because its photons lack the energy to ionize atoms , it can cause chemical reactions and causes many substances to glow or fluoresce. Consequently, the chemical and biological effects of UV are greater than simple heating effects, and many practical applications of UV radiation derive from its interactions with organic molecules. Short-wave ultraviolet light damages DNA and sterlizes surfaces with which it comes into contact. For humans, suntan and sunburn are familiar effects of exposure of the skin to UV light, along with an increased risks of skin cancer.
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Basics of Ultraviolet Disinfection Technology

Easy-to-read, question-and-answer fact sheets covering a wide range of workplace health and safety topics, from hazards to diseases to ergonomics to workplace promotion. Download the free OSH Answers app. Search all fact sheets:. Ultraviolet UV radiation is similar to visible light in all physical aspects, except that it does not enable us to see things.
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Some features of this site are not compatible with your browser. Install Opera Mini to better experience this site. Several factors account for this variation at any given location.
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