UltraViolet Waves

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by SerenityClement
Last updated 5 years ago

Discipline:
Science
Subject:
Earth Sciences
Grade:
8

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UltraViolet Waves

UltraViolet Waves

Wavelenght

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Ultraviolet Waveimages

Definition

citations

http://www.stmary.ws/highschool/physics/uv_1.htmGooglehttp://www.windows2universe.org/physical_science/magnetism/em_ultraviolet.html..........http://www.infoplease.com/encyclopedia/science/ultravioletradiation.html...https://sites.google.com/site/uvraysallyouneedtoknow/interesting-facts-2...http://sciencelearn.org.nz/Contexts/You-Me-and-UV/Science-Ideas-and-Concepts/Uses-for-UV

UV "light" has wavelengths between about 380 and 10 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 1012 hertz) and 30,000 THz.

Medicine:Ultraviolet waves are effective in killing bacteria and viruses. Hospitals use germicidal lamps that produce these waves to sterilize equipment, water and air in operating rooms. It is also used to treat acne and psoriasis. Industry:The Food and Drug industry uses germicidal lamps to disinfect various types of products and their containers. The main use of ultraviolet is in the manufacturing integrated circuits.Science:Scientists learn about the make up and energy levels of atoms by studying UV rays. Experts also learn abut distant stars and galaxies by analyzing the UV rays that are given off. Artificial sources of ultraviolet light are often used to stimulate the effects of solar ultraviolet radiation in the study of the deterioration of materials on exposure to sunlightConsumer Goods:Ultraviolet waves are used to identify materials by the glow or fluorescence under them. They are used to make black lights. May food and drug companies use germicidal lamps to disinfect various types of products, and their containers.

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.

USES OF ULTRAVIOLET WAVES

Frequancy

ultraviolet radiation, invisible electromagnetic radiation between visible violet light and X rays; it ranges in wavelength from about 400 to 4 nanometers and in frequency from about 1015 to 1017 hertz.

1.When we expose our skin to UVB, it stimulates the production of vitamin D, which our bodies need. Window glass absorbs UVB, so people need to go outside to gain the benefit. However, too much exposure to UVB can cause skin cancers, so the aim is to find the optimum amount of exposure. UV lamps are used in sun beds to give the users a sun tan, but this use of UV is controversial.2.UVB also helps us when we hang washing outside to dry, as some of the bacteria present in the washing are inactivated by exposure to UVB. This helps to protect us from infection and is another reason to dry washing outside rather than in an energy-hungry dryer3.The ability of UV to inactivate bacteria and viruses is taken further by using artificially produced UVC to sterilise surfaces of things such as medical equipment. Auckland’s sewage treatment plant uses UVC to inactivate bacteria and viruses just before discharging the clear effluent into the Manukau Harbour.4.UVC is called “germicidal UV” because it is able to directly disable the strands of DNA in bacteria and viruses and make them inert. Inactivated bacteria and viruses are as good as dead because they are not able to reproduce and multiply.

Uses for ultarviolet waves

1. Ultraviolet simply means "beyond light", in this case the visible type that us humans can see. It is also called "black light" due to it being invisible.

2. UV rays can be used to sterilize and disinfect hospital and other medical equipment. This happens when the equipment in question is exposed to artificial light created by UV lamps. The Ultraviolet radiation emitted by the lamps kills any living cells2. UV rays can be used to sterilize and disinfect hospital and other medical equipment. This happens when the equipment in question is exposed to artificial light created by UV lamps. The Ultraviolet radiation emitted by the lamps kills any living cells (good or bad) on the equipment. (good or bad) on the equipment.

2 interesting facts


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