Ultrakortbølgebåndet

Ultrakortbølgebåndet, also known as the ultraviolet spectrum, is a segment of the electromagnetic radiation spectrum with wavelengths shorter than visible light but longer than X-rays. It is typically divided into three regions: UV-A, UV-B, and UV-C. UV-A has the longest wavelengths, ranging from 315 to 400 nanometers, and is the least harmful to living organisms. UV-B ranges from 280 to 315 nanometers and is more energetic, capable of causing sunburn and skin damage. UV-C, with wavelengths from 100 to 280 nanometers, is the most energetic and is absorbed by the Earth's ozone layer, preventing it from reaching the surface. Ultrakortbølgebåndet is produced by the Sun and artificial sources like mercury-vapor lamps and tanning beds. It has various applications, including sterilization, fluorescence, and photochemistry, but also poses health risks such as skin cancer and eye damage. Protection from UV radiation is crucial, and measures include wearing sunscreen, protective clothing, and seeking shade.