I Transmission and absorbance of materials in the deep UV

AI Thread Summary
Materials with high transmittance often begin to absorb in the deep UV due to the increased energy of light quanta, which can excite more electrons. This absorption occurs at specific wavelengths where the material's electronic structure allows for transitions, leading to different absorption edges among materials. The variation in absorption edges is attributed to differences in electronic band structures and the energy levels of electrons in different materials. Interestingly, transmittance can improve again at x-ray wavelengths due to changes in electron interactions. Understanding these phenomena is crucial for applications in optics and materials science.
DariusP
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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?
 
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Don't worry. They get their transmittance back when you get to x-rays. :smile:

The mo`re energy the light quantum has, the more electrons are available for it to excite.
 
Vanadium 50 said:
Don't worry. They get their transmittance back when you get to x-rays. :smile:

The mo`re energy the light quantum has, the more electrons are available for it to excite.
But why does it start to suddenly absorb in deep UV? Any explanation for the edge and why different materials have different absorption edges?
 

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