UV is an abbreviation that stands for ultraviolet. It refers to electromagnetic radiation with a wavelength shorter than that of visible light but longer than X-rays. The UV spectrum is generally categorized into three types based on wavelength: UV-A, UV-B, and UV-C.
UV-A, the longest wavelength region of the ultraviolet spectrum, ranges from 315 to 400 nanometers (nm). It is often referred to as "blacklight" and is commonly used in applications such as forensic analysis, curing adhesives, and fluorescence experiments. UV-A rays have the least amount of energy among the three types and are less damaging to the skin.
UV-B, with wavelengths ranging from 280 to 315 nm, is responsible for causing sunburns and skin damage, as well as playing an essential role in the production of vitamin D in the body. Protection against UV-B rays is crucial to prevent sunburn and minimize the risk of developing skin cancer.
UV-C, the shortest and most energetic type of ultraviolet radiation, spans from 200 to 280 nm. It is almost entirely absorbed by the Earth's atmosphere, primarily by the ozone layer, and is commonly used in germicidal applications, such as water or air purification. UV-C is highly harmful to living organisms and is generally not a concern in everyday exposure situations.
Overall, UV radiation holds both beneficial and harmful effects, making understanding and managing exposure crucial to health and safety.
