Ultraviolet - Wikipedia
网页Ultraviolet (UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun.
Radiation: Ultraviolet (UV) radiation
网页2016年3月9日 · Solar emissions include visible light, heat and ultraviolet (UV) radiation. Just as visible light consists of different colours that become apparent in a rainbow, the UV radiation spectrum is divided into three regions called UVA, UVB and UVC.
What is UV radiation and how does it affect health?
网页2023年8月24日 · 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...
Ultraviolet radiation | Definition, Examples, Effects ...
网页2024年8月6日 · What is ultraviolet radiation used for? Can ultraviolet radiation cause cancer? ultraviolet radiation, that portion of the electromagnetic spectrum extending from the violet, or short-wavelength, end of the visible light range to the X-ray region.
Facts About Ultraviolet Radiation | Radiation and Your Health ...
网页2024年2月20日 · Ultraviolet (UV) radiation is a form of non-ionizing radiation that is emitted by both natural and artificial sources. There are both benefits and risks to UV radiation. You should always protect yourself from over-exposure to reduce your risk of sunburn, premature aging, and skin cancer.
Ultraviolet radiation - World Health Organization (WHO)
网页Key facts. Skin cancers are caused primarily by exposure to ultraviolet radiation (UVR), either from the sun or from artificial sources such as sunbeds. Globally in 2020, over 1.5 million cases of skin cancers were diagnosed and over 120 000 skin cancer-associated deaths were reported.
Ultraviolet Radiation | Radiation and Your Health | CDC
网页2024年2月15日 · 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.
Ultraviolet (UV) Radiation: What It Is & Its Effect on Your Skin
网页What is ultraviolet radiation? Ultraviolet (UV) radiation is a form of energy that the sun produces. You can’t see UV radiation because its wavelengths are shorter than visible light. The UV energy that the sun produces reaches the Earth and provides vitamin D for your body to help you survive.
Ultraviolet Radiation - Johns Hopkins Medicine
网页Ultraviolet (UV) radiation is a type of light. Sunlight has UV rays, along with other kinds of rays. Some light bulbs give off UV rays. UV light bulbs are used in tanning machines, some nail dryers, machines used by dermatologists, and more.
Ultraviolet radiation - World Health Organization (WHO)
网页2024年7月30日 · Ultraviolet (UV) radiation covers the wavelength range of 100–400 nm, which is a higher frequency and lower wavelength than visible light. UV radiation comes naturally from the sun, but it can also be created by artificial sources used in industry, commerce and recreation.