Ultraviolet - Wikipedia
ウェブ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.
Ultraviolet radiation | Definition, Examples, Effects ...
ウェブ2024年4月3日 · 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. Ultraviolet (UV) radiation is undetectable by the human eye , although, when it falls on certain materials, it may cause them to fluoresce —i.e., emit …
Radiation: Ultraviolet (UV) radiation
ウェブ2016年3月9日 · The UV region covers the wavelength range 100-400 nm and is divided into three bands: UVA (315-400 nm) UVB (280-315 nm) UVC (100-280 nm). Short-wavelength UVC is the most damaging type of UV radiation. However, it is completely filtered by the atmosphere and does not reach the earth's surface.
Ultraviolet radiation - World Health Organization (WHO)
ウェブ2022年6月21日 · 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. Worldwide, it is estimated that 15 million …
Ultraviolet Waves - NASA Science
ウェブ2016年8月10日 · Ultraviolet (UV) light has shorter wavelengths than visible light. Although UV waves are invisible to the human eye, some insects, such as bumblebees, can see them. This is similar to how a dog can hear the sound of a whistle just outside the hearing range of humans.
Ultraviolet (UV) Radiation | Center for Science Education
ウェブUltraviolet radiation lies between visible light and X-rays along the electromagnetic spectrum. UV "light" spans a range of wavelengths between about 10 and 400 nanometers. The wavelength of violet light is around 400 nanometers (or 4,000 Å). Ultraviolet radiation oscillates at rates between about 800 terahertz (THz or 10 12 …
ultraviolet radiation summary | Britannica
ウェブultraviolet radiation, Portion of the electromagnetic spectrum extending from the violet end of visible light to the X-ray region. Ultraviolet (UV) radiation lies between wavelengths of about 400 nanometres and 10 nanometres, corresponding to frequencies of 7.5 × 10 14 Hz to 3 × 10 16 Hz.
Radiation: The known health effects of ultraviolet radiation
ウェブ2017年10月16日 · Radiation: The known health effects of ultraviolet radiation. Do UVA and UVB affect the body in different ways? Are there beneficial effects of UV radiation? What are the effects of UV on the skin? What are the effects of UV on the eye? Does UV interact with the immune system?
Ultraviolet Radiation: How It Affects Life on Earth
ウェブUltraviolet (UV) radiation that reaches the Earth’s surface is in wavelengths between 290 and 400 nm (nanometers, or billionths of a meter). This is shorter than wavelengths of visible light, which are 400 to 700 nm. People and plants live with both helpful and harmful effects of ultraviolet (UV) radiation from the sun.
What is UV radiation and how does it affect health?
ウェブ2023年8月24日 · Summary. UV radiation comes primarily from the sun and is made up of UVA, UVB, and UVC rays. UVC rays do not reach Earth, but both UVA and UVB rays pose health risks. While UVB rays are the ...
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