Give two uses of ultra violet radiations?

Two major uses of ultraviolet (UV) radiation include sterilization and disinfection of surfaces, air, and water, as well as medical treatments such as eye surgery (LASIK) and therapy for skin conditions.

Additionally, UV radiation has industrial applications like curing inks and coatings, and it is also used in security systems to detect forged documents or trigger burglar alarms.

1. Sterilization and disinfection

UV radiation destroys bacteria, viruses, and other harmful microorganisms by breaking down their DNA.

This property makes it highly effective for sterilizing medical tools, purifying drinking water, and disinfecting air in sensitive environments like operating rooms, hospitals, and laboratories.

2. Medical and health applications

• LASIK eye surgery: Focused UV light is used to reshape the cornea, improving vision and reducing the need for glasses or contact lenses.
• Skin treatments: Specific UV wavelengths help treat conditions such as psoriasis and eczema, and controlled exposure assists the body in producing vitamin D, essential for bone health and immune function.