The light rays used for eliminating bacteria?
Correct answer: D. ultra-violet radiation
- A. X-rays
- B. infrared rays
- C. microwave radiation
- D. ultra-violet radiation
Explanation
Ultraviolet radiation damages the DNA of microorganisms and is therefore used to disinfect water, air and surfaces. X-rays can also kill cells at high doses, but UV is the standard radiation used for routine germicidal treatment.
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