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15 de feb. de 2024 · Ultraviolet (UV) radiation is a form of non-ionizing radiation that is emitted by the sun and artificial sources, such as tanning beds. While it has some benefits for people, including the creation of Vitamin D, it also can cause health risks. Our natural source of UV radiation: The sun. Some artificial sources of UV radiation include:
15 de sept. de 2017 · Tanning is the body's natural shield against uv rays.(Image credit: Stock.Xchng.) Ultraviolet light is a type of electromagnetic radiation that makes black-light posters glow, and is responsible ...
Ionizing radiation can damage the DNA (genes) in cells, which in turn may lead to cancer. But even the highest-energy UV rays don’t have enough energy to penetrate deeply into the body, so their main effect is on the skin. UV radiation is divided into 3 main groups: UVA rays have the least energy among UV rays.
Acute effects of UV radiation exposure include photokeratitis and photoconjunctivitis. These inflammatory reactions are comparable to a sunburn of the very sensitive skin-like tissues of the eyeball and eyelids, and usually appear within a few hours of exposure. Both can be very painful, but are reversible and do not result in any long-term ...
24 de ago. de 2023 · Ultraviolet (UV) radiation is one part of the electromagnetic spectrum of radiation that reaches Earth from the sun. It is a form of light energy situated on the spectrum just beyond visible light.
紫外线辐射的急性影响包括DNA损伤、晒伤、光毒性和光过敏反应以及免疫系统抑制。. 免疫抑制可被视为癌症的一个危险因素，可能会再度激活病毒（例如唇疱疹）。. 暴露于紫外线辐射对皮肤和嘴唇的长期影响包括：. 皮肤黑色素瘤：一种危及生命的恶性皮肤癌 ...
UVB - Ultraviolet radiation in the range 280nm to 315nm is more dangerous than UVA and has been implicated as the major cause of skin cancers, sunburning and cataracts. UVC - Ultraviolet radiation in the range 100nm to 280nm is extremely dangerous but does not reach the earth’s surface due to absorption in the atmosphere by ozone.
