What characteristic of ultraviolet light makes it useful for sterilization purposes?

• A. long wavelengths
• B. high frequencies
• C. low energy
• D. visible range

Answer: (B)

Ultraviolet light is particularly effective for sterilization due to its high frequencies. This characteristic is fundamental to its ability to inactivate bacteria, viruses, and other pathogens. High-frequency ultraviolet light has a shorter wavelength compared to visible light, which allows it to carry more energy. This energy is capable of disrupting the molecular structure of microorganisms by damaging their DNA or RNA, ultimately preventing them from replicating and causing infection.

In practical applications, UV light is widely used in various sterilization technologies, such as in water treatment, disinfection of surfaces, and even in air purification systems. Its effectiveness stems from the fact that most pathogens are particularly sensitive to UV radiation, making it a reliable method for ensuring hygiene and safety in various environments.