UVstråling

UVstråling, or ultraviolet radiation, is a form of electromagnetic radiation with wavelengths shorter than visible light but longer than X-rays. It is part of the electromagnetic spectrum emitted by the sun. UV radiation is typically categorized into three types based on wavelength: UVA, UVB, and UVC.

UVA radiation has the longest wavelength and can penetrate the skin's outer layer, contributing to skin aging and wrinkle formation. It is also linked to some types of skin cancer. UVB radiation has a shorter wavelength and is primarily responsible for sunburn and can directly damage the DNA in skin cells, significantly increasing the risk of skin cancer. UVC radiation has the shortest wavelength and is the most energetic, but it is largely absorbed by the Earth's ozone layer and therefore does not reach the surface in significant amounts.

Exposure to UV radiation can have both beneficial and harmful effects. Beneficial effects include the stimulation of vitamin D production in the skin, which is essential for bone health. However, excessive exposure is linked to a range of health problems. These include sunburn, premature skin aging (photoaging), cataracts, and various forms of skin cancer, including basal cell carcinoma, squamous cell carcinoma, and melanoma.

Protection against excessive UV radiation is important. This can be achieved through measures such as wearing sunscreen with adequate SPF, protective clothing, hats, and sunglasses, and by limiting sun exposure during peak hours when UV radiation is strongest.