Ultraviolet Presentation
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Ultraviolet radiation has wavelengths between 400nm and 15nm, falling between violet light and X-rays on the electromagnetic spectrum. It is divided into UV-A from 400-320nm, UV-B from 320-280nm, and UV-C from 280-100nm, with shorter wavelengths being more energetic and potentially dangerous. UV-A passes through glass while UV-B induces vitamin D production but can cause harm from overexposure.
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Ultraviolet (UV) radiation has wavelengths shorter than visible light. It is emitted by the sun and can be produced artificially. UV is divided into UVA, UVB, and UVC. While overexposure can harm health, moderate UV has benefits like vitamin D production. UV is used in applications like disinfection, lithography, and forensic analysis due to its ability to cause chemical reactions and fluorescence.
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Ultraviolet light was discovered in 1801 by German physicist Johann Wilhelm Ritter. It is a type of electromagnetic radiation with wavelengths shorter than visible light but longer than X-rays, between 300 to 400 nanometers. UV radiation can damage components of paper, photographs, inks and other materials by causing photoionization which alters atoms and molecules. The UV spectrum is divided into UVA, UVB, and UVC bands with different wavelengths. The sun is a major natural source of UV rays, with UVA making up most of the UV that reaches Earth. UV exposure can benefit humans by producing vitamin D but too much causes sunburns and skin damage. UV light has applications in security, forensics
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South African Journal of Science: Writing with integrity workshop (2024)
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Digital Artefact 1 - Tiny Home Environmental Design
Digital Artefact 1 - Tiny Home Environmental Design
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
Ultraviolet Presentation
- 2. On the Electromagnetic Spectrum Ultraviolet Wavelength between 400nm, that of violet light and 15nm, that of X rays. Ultraviolet literally means “beyond violet”.
- 3. Types Name Wavelength / nm Energy per photon / ev UV-A 400 - 320 3.10 - 3.94 UV-B 320 - 280 3.94 - 4.43 UV-C 280 - 100 4.43 - 12.4 Generally speaking, the shorter the wavelength, the more dangerous the radiation is.
- 4. UV-A Passes through ordinary glass. Makes up for 98.7% of the ultraviolet radiation that reaches the Earth’s surface.
- 5. UV-B Positives Induces vitamin D production. Negatives Overexposure