- #1
DariusP
- 50
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I wanted to ask - why do some materials with very high transmittance inevitably start to absorb in deep UV? Is there an explanation?
Transmission and absorbance of materials in the deep UV
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- Thread starter DariusP
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In summary, materials with high transmittance in visible light can start to absorb in deep UV due to the increased energy of light quanta. This allows for more electrons to be excited, causing the material to absorb the light. However, this absorption is temporary and the transmittance returns when exposed to x-rays. The absorption edge and variations among different materials can be explained by the availability of electrons and their excitation levels.
- #2
Vanadium 50
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Don't worry. They get their transmittance back when you get to x-rays. 
The mo`re energy the light quantum has, the more electrons are available for it to excite.
The mo`re energy the light quantum has, the more electrons are available for it to excite.
- #3
DariusP
- 50
- 3
But why does it start to suddenly absorb in deep UV? Any explanation for the edge and why different materials have different absorption edges?Vanadium 50 said:Don't worry. They get their transmittance back when you get to x-rays.
The mo`re energy the light quantum has, the more electrons are available for it to excite.
1. What is the deep UV region and why is it important?
The deep UV region refers to the portion of the electromagnetic spectrum with wavelengths between 100-280 nanometers. This region is important because it contains high energy radiation that can interact with and be absorbed by materials, making it useful for various scientific and industrial applications.
2. How does the transmission of materials in the deep UV region differ from other regions?
The transmission of materials in the deep UV region is significantly lower compared to other regions of the electromagnetic spectrum. This is due to the high energy of the radiation in this region, which can cause strong absorption and scattering in most materials.
3. What factors affect the absorbance of materials in the deep UV region?
The absorbance of materials in the deep UV region is affected by several factors, including the material's composition, thickness, and surface properties. The wavelength of the radiation and the angle of incidence also play a role in determining the absorbance of a material.
4. How is the absorbance of materials in the deep UV region measured?
The absorbance of materials in the deep UV region can be measured using a spectrophotometer, which measures the amount of light that is transmitted through a sample at different wavelengths. The absorbance is then calculated using the Beer-Lambert Law, which relates the absorbance to the concentration and thickness of the material.
5. What are some applications of understanding the transmission and absorbance of materials in the deep UV region?
Understanding the transmission and absorbance of materials in the deep UV region is important for various applications, such as developing UV-blocking materials for sun protection, designing optical filters and lenses, and studying the effects of UV radiation on materials and living organisms. It is also crucial in industries such as semiconductor manufacturing, where precise control of UV radiation is necessary for the production of electronic devices.
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