Print Friendly, PDF & Email

What is ultraviolet germicidal radiation (UVGI)?

Topics Covered: Achievements of Indians in science & technology; indigenization of technology and developing new technology.

What is ultraviolet germicidal radiation (UVGI)?

What to study?

For Prelims and Mains: UV rays- significance in detecting Coronavirus, challenges.

Context: Scientists are studying the use of ultraviolet germicidal radiation (UVGI) to detect Coronavirus in schools, restaurants and other public places.

Through this method, ultraviolet (UV) lights would be able to disinfect contaminated public spaces to stop the transmission of the virus.

What is UV light?

UV light from the sun has shorter wavelengths than visible light and, therefore, is not visible to the naked eye.

The full spectrum of UV radiation is sourced from the sun and can be subdivided into UV-A, UV-B and UV-C rays.

In this spectrum, UV-C rays are the most harmful and are completely absorbed by the Earth’s atmosphere.

 How it affects human body?

  • While both UV-A and UV-B rays are harmful, exposure to UV-B rays can cause DNA and cellular damage in living organisms.
  • Increased exposure to it can cause cells to become carcinogenic, thereby increasing the risk of getting cancer.

So, how does UVGI work?

UVGI uses the “destructive properties” of UV light to target pathogens.

  • UVGI replicates UV wavelengths that disinfects contaminated spaces, air and water.
  • UVGI lamps can also be installed in the corners of a room and alternatively, can be installed in air ducts of ventilation systems or portable or fixed air cleaners.

Sources: Indian Express.