Search results
23 wrz 2024 · In physics, ultraviolet radiation is traditionally divided into four regions: near (400–300 nm), middle (300–200 nm), far (200–100 nm), and extreme (below 100 nm).
- Ultraviolet Radiation
Ultraviolet radiation is emitted from some high-temperature...
- Tanning
Other articles where suntan is discussed:...
- Skin
Human skin, in human anatomy, the covering, or integument,...
- Sunburn
Sunburn, acute cutaneous inflammation caused by overexposure...
- Ultraviolet Astronomy
Ultraviolet astronomy, study of the ultraviolet spectra of...
- Carcinoma
carcinoma, a cancerous growth of surface tissues of the...
- Psoriasis
Psoriasis, a chronic, recurrent inflammatory skin disorder....
- Excitation
Excitation, in physics, the addition of a discrete amount of...
- Ultraviolet Radiation
Examples of Ultraviolet Waves. 1. Disinfectants. Ultraviolet radiations are capable of killing bacteria and viruses. It has been experimentally verified that bacteria and viruses become inactive after being exposed to ultraviolet radiations. This property of the UV radiations is utilized in disinfecting the air, water, surfaces, and objects.
UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs, Cherenkov radiation, and specialized lights, such as mercury-vapor lamps, tanning lamps, and black lights.
1 kwi 2023 · The primary source of UV light is the Sun, which emits radiation across the entire UV spectrum. However, only UVA and UVB radiation reach the Earth’s surface, as the ozone layer absorbs UVC. Other sources of UV light include artificial sources like black lights, tanning lamps, mercury vapor lamps, high pressure xenon lamps, welding arcs, and ...
10 sie 2016 · NASA's SDO spacecraft captured the image below in multiple wavelengths of extreme ultraviolet (EUV) radiation. The false-color composite reveals different gas temperatures. Reds are relatively cool (about 60,000 Celsius) while blues and greens are hotter (greater than one million Celsius).
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 hertz) and 30,000 THz.
1 Introduction to ultraviolet radiation 1.1 General characteristics Ultraviolet radiation or ultraviolet light (UV) is part of the spectrum of elec-tromagnetic waves, covering the interval between X-rays and visible light. Al-though real boundaries between these different kinds of radiation do not
