CBSE Class 12 Physics 2023 Delhi Set 2 Paper

Question : 6 of 11

Marks: +1, -0

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.

Solution:

The electromagnetic radiation which is used to kill germs in water purifier: Ultraviolet rays.
Wavelength range of ultraviolet radiation:

1 {\nm}-400

{\nm}

Sources of ultraviolet radiation: Sunlight, electric arcs.

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