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प्रश्न
Electromagnetic waves used for purification of water are ______.
पर्याय
X-rays
Ultraviolet rays
Infrared rays
Ultrasonic rays
MCQ
रिकाम्या जागा भरा
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उत्तर
Electromagnetic waves used for purification of water are ultraviolet rays.
Explanation:
Ultraviolet (UV) rays, particularly in the UV-C spectrum (wavelengths approximately 254 nm), are employed for water purification. These rays possess germicidal properties; they enter the cells of microorganisms such as bacteria, viruses, and parasites, therefore eliminating their DNA. This inhibits pathogen reproduction and disease symptoms, effectively disinfecting the water without introducing chemicals or altering its taste.
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