What is the name of the short wave ultraviolet radiation used to sanitize small items, requiring prior cleaning and turning the item after about 20 minutes per side?

• A. Infrared Radiation
• B. Visible Light
• C. Gamma Radiation
• D. Ultraviolet Radiation (UV)

Answer: (D)

Shortwave ultraviolet light is used for disinfection because UV-C in particular has germicidal properties that damage microorganisms’ DNA or RNA, preventing them from replicating. For small items, you clean first to remove dirt that can shield microbes, then place the item in the UV unit and turn it after about 20 minutes per side so all surfaces receive exposure, since UV light works best on unobstructed surfaces. This method is specifically UV radiation (UV-C) for sanitizing. Infrared is heat and won’t disinfect, visible light isn’t effective for killing microbes, and gamma radiation is used in more industrial sterilization contexts and isn’t typical for routine small-item sanitizing.