UV Radiation and classification

UV Radiation and classification

UV-C:
- Short-wavelength.
- Most harmful but are completely absorbed by the Earth’s atmosphere and does not reach the Earth’s surface.
UV-B:
- Medium-wavelength.
- Biologically active but cannot penetrate beyond the superficial skin layers.
- Responsible for delayed tanning and burning.
- Enhances skin ageing and significantly promotes the development of skin cancer.
- Exposure to UV-B rays can cause DNA and cellular damage in living organisms.
- Most solar UVB is filtered by the atmosphere.
UV-A:
- Relatively long-wavelength.
- Accounts for approximately 95% of the UV radiation reaching the Earth's surface.
- Penetrate into the deeper layers of the skin and is responsible for the immediate tanning.
- Enhances the development of skin cancers.

UVGI (Ultra violet germs irradiation) Working Method:

- UVGI replicates UV wavelengths and uses its destructive properties to target pathogens.
- It disinfects contaminated spaces, air and water and helps in preventing certain infectious diseases from spreading.
- According to the US Centers for Disease Prevention and Control (CDC), UVGI is a promising method for disinfection.
  - In 2005, the CDC revised its guidelines for using UVGI with regards to the spread of tuberculosis (TB) in hospital settings.
  - The guidelines intended to eliminate the spread of infection to healthcare workers from patients or others with unsuspected or undiagnosed infection.
- Scientists advise that fixtures containing UVGI lamps can be mounted on the walls or suspended from the ceilings.
  - Such fixtures will shine light on the upper interior surface of a room and trap pathogens.
  - Installing a fan in such spaces can further draw the air upward, which will increase the speed with which the UVGI can destroy pathogens.
- UVGI lamps can also be installed in room corners, in air ducts of ventilation systems or portable or fixed air cleaners.
- UVGI fixtures are and should be installed above people’s heads because their short wavelengths can irritate the skin and eyes.

Source: Web

Join Our Telegram

AI Impact Summit 2026 UPSC GS-3 S&T PT-MAINS

India’s Indo-Pacific Oceans Initiative (IPOI) UPSC GS-2 INDO PACIFIC – IR/PSIR

20 Nov, 25
SHARE

India’s Indo-Pacific Oceans Initiative (IPOI) UPSC GS-2 INDO PACIFIC – IR/PSIR IPOI is India’s open, voluntary and non-treaty-based maritime initiative for building a free, open, inclusive and rules-based Indo-Pacific through practical cooperation. Why in News? India’s Indo-Pacific Oceans Ini

AI Impact Summit 2026 UPSC GS-3 S&T PT-MAINS

19 May, 26
SHARE

AI Impact Summit 2026 UPSC GS-3 S&T PT-MAINS The India-AI Impact Summit 2026 positioned India as a Global South leader by shifting global AI debate from only AI safety and regulation to AI for development, inclusion and real-world impact. Why in News? India hosted the India-AI Impact Summit 2026 at B

Hong Kong Convention for Safe Ship Recycling UPSC GS-3 ENVIRONMENT PT-MAINS

27 Jun, 25
SHARE

Hong Kong Convention for Safe Ship Recycling UPSC GS-3 ENVIRONMENT PT-MAINS The Hong Kong International Convention, 2009 is an IMO treaty that ensures ships are recycled safely without unnecessary risk to human health, worker safety and the environment. Why in News? The Hong Kong Convention entered into force on 26 June 2

LeadIT 2.0: Leadership Group for Industry Transition COP28 UPSC GS-2 IR GS-3 S&T

14 Nov, 23
SHARE

LeadIT 2.0: Leadership Group for Industry Transition UPSC GS-2 IR GS-3 S&T LeadIT 2.0 is the second phase of the India-Sweden-led global initiative to support low-carbon transition in hard-to-abate industrial sectors. Why in News? The second phase of LeadIT was announced at the LeadIT Summit 2023, ho

India-EFTA Trade and Economic Partnership Agreement UPSC GS-2 IR/PSIR

03 Sep, 25
SHARE

India-EFTA Trade and Economic Partnership Agreement UPSC GS-2 IR/PSIR The India-EFTA TEPA is a comprehensive trade pact between India and four non-EU European countries — Iceland, Liechtenstein, Norway and Switzerland — aimed at boosting trade, investment, jobs, services, technology and supply-chain resilience. Wh