CBSE Class 12 Physics 2023 Delhi Set 2 Paper

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Question : 6
Total: 11
SECTION - B

Identify the electromagnetic radiation and write its wavelength range which is used to kill germs in water purifier. Name the two sources of these radiations.
The electromagnetic radiation which is used to kill germs in water purifier: Ultraviolet rays.
Wavelength range of ultraviolet radiation: 1‌nm−400 nm
Sources of ultraviolet radiation: Sunlight, electric arcs.
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