Презентация к уроку-конференции по теме "Environmental problems"
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ultraviolet_radiation.pptx | 989.82 КБ |
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Ultraviolet radiationСлайд 2
Ultraviolet radiation-the invisible eye of electromagnetic radiation.
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The main source of ultraviolet radiation on the earth-sun.
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Artificial sources of ultraviolet radiation, the UV lamp. They were developed in the 60 years to compensate for the "UV insufficiency" natural radiation.
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Black lamps are used to protect documents against forgery.
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UV lamps are used to sterilize instruments and premises.
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The UV radiation use for disinfection for drinking water, catching insects, mineral analysis.
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Ultraviolet radiation can be dangerous in large quantities.
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