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Write short notes on Ultraviolet rays...

Write short notes on
Ultraviolet rays

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Ultraviolet rays: The wavelength of UV rays varies from 400nm to 0.6nm. The welders wear special goggles with glass to protect the eyes from UV rays. The sun is an important source of UV rays. These waves are absorbed by the ozone layer in the atmosphere. These rays are very harmful to living tissues. UV radiation is absorbed by ordinary glass. They are used to preserve food stuff and also for the study of the structure of molecules.
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