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Vacuum UV & UV-Vis Wavelength

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Vacuum UV & UV-Vis Wavelength

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Ultraviolet light lies just outside the range of visible light our eyes can detect. Its wavelengths are shorter and higher energy than visible light. Even though our eyes can’t directly detect ultraviolet light, we can see its effects

Ultraviolet light lies just outside the range of visible light our eyes can detect. Its wavelengths are shorter and higher energy than visible light. Even though our eyes can’t directly detect ultraviolet light, we can see its effects

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Vacuum UV & UV-Vis Wavelength

  1. 1. V-UV & UV-Vis Ir. Sugeng Endarsiwi
  2. 2. Artificial sources include: Tanning booths Black lights Germicidal lamps Mercury vapor lamps Halogen lights High-intensity discharge lamps Fluorescent and incandescent sources Some types of lasers. The sun is our primary natural source of UV radiation. Although UV light can be dangerous, it is also very valuable and is used in many ways. Ultraviolet (UV) light is a type of electromagnetic radiation that is all around us even though our eyes can't detect it. Our bodies use it to make vitamin D, but too much exposure can cause painful burns and even cancer.
  3. 3. • Mercury vapor lamps (widely used in Printing Industry)
  4. 4. • UV lamps, solidify printing inks and coatings by using high intensity ultraviolet light, instead of drying, to initiate the needed chemical reaction - this reaction almost instantly turns inks and coatings into solids, effectively curing them onto whatever substrate to which they were applied. • In commercial printing, high-pressure mercury-arc lamps / bulbs and similar designs are used to create the required UV light for the print- curing process. (Uva, Uvb, Uvc are most used in Printing Industry.
  5. 5. 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. (Sumber: https://science.nasa.gov/ems/10_ultravioletwaves)
  6. 6. • Ultraviolet light with wavelengths in the 100–200 nm range (known as the vacuum ultraviolet; VUV). • The vacuum-ultraviolet (VUV) region of the electromagnetic spectrum is situated between the far- UV and X-ray regions. • It covers a vast range of photon energy from 6.20 eV (200 nm) to 41.3 eV (30 nm).
  7. 7. What is UV-Vis-NIR? UV-Vis-NIR refers to ultraviolet, visible, near-infrared. Ultraviolet-visible (UV-Vis) spectrophotometers use a light source to illuminate a sample with light across the UV to the visible wavelength range of the electromagnetic spectrum (typically 190 to 900 nm). UV-Vis-NIR spectrophotometers have an extended wavelength range, into the near- infrared (NIR) region (800 to 3,200 nm). UV-Vis-NIR instruments are used in cutting-edge materials research, including analysis of solar cells, nanocomposites, optical components, thin films, gels, wafers and filters, as well as biotech and pharmaceutical applications
  8. 8. • Ultraviolet light lies just outside the range of visible light our eyes can detect. Its wavelengths are shorter and higher energy than visible light. Even though our eyes can’t directly detect ultraviolet light, we can see its effects. • (Source: https://hubblesite.org/contents/articles/observing-ultraviolet-light)
  9. 9. • Source: • https://zeiss-campus.magnet.fsu.edu/articles/lightsources/mercuryarc.html • https://www.nature.com/articles/s41566-018-0270-9#

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