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Often called black light, ultraviolet radiation is invisible to the human eye, but when it falls on certain surfaces, it causes them to fluoresce, or emit visible light.
- Radiation
Ultraviolet radiation is used by the skin to make a nutrient...
- Radiation
8 cze 2024 · Ultraviolet light is a type of ionizing radiation. It can damage or kill cells. Any electromagnetic radiation (light) that has a wavelength shorter than 450 nm may cause trouble. Therefore, humans that live in places with more ultraviolet light have adapted by getting darker skins.
Ultraviolet radiation is used by the skin to make a nutrient called vitamin D. X-rays are used to make a picture of something inside an object, such as bones inside the body. Gamma rays are used in medicine to kill cancer cells. The shorter the wavelength, the more energy the radiation carries.
Ultraviolet rays are waves of light that come from the sun. In this lesson, learn about different types of ultraviolet rays, the characteristics and effects of ultraviolet rays,...
Ultraviolet (UV) light is part of a family of radiations called the electromagnetic (EM) spectrum. UV is just beyond the violet end of visible light and has smaller wavelengths and greater energy. As with all electromagnetic spectrum radiations, UV travels at the speed of light.
Ultraviolet (UV) radiation is electromagnetic radiation of a wavelength shorter than that of visible light, but longer than that of soft X-rays. The name means "beyond violet" (from Latin ultra, "beyond"), violet being the color of the shortest wavelength of visible light.
The ultraviolet index, or UV index, is an international standard measurement of the strength of the sunburn-producing ultraviolet (UV) radiation at a particular place and time. It is primarily used in daily and hourly forecasts aimed at the general public.
