Why do glass and crsytals absorb light?

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Discussion Overview

The discussion revolves around the factors that determine why certain materials, specifically glass and crystals, absorb light. Participants explore the role of electron orbitals, interactions among electrons, and the complexities introduced in solid materials compared to gases and metals.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions what determines light absorption, suggesting it may relate to the electron orbitals and the unique properties of glass and crystals compared to materials like wood and metal.
  • Another participant asserts that electron interactions within a material influence light absorption, noting that complex materials like wood or glass lack discrete orbitals.
  • A different viewpoint highlights that the absorption spectra of gases are determined by their orbitals, while solids involve more complex phenomena such as electronic band structure, which is not present in single atoms.
  • One participant mentions that metals are unique due to their conductive properties and expresses uncertainty about what specifically makes glass or water special in terms of light absorption.
  • Another claim states that transparency to visible radiation occurs when there are no electronic transitions available for the incoming radiation.

Areas of Agreement / Disagreement

Participants do not reach a consensus, as there are multiple competing views on the mechanisms of light absorption in different materials, particularly between gases, solids, and metals.

Contextual Notes

The discussion includes unresolved questions about the specific properties of glass and crystals, the role of electron interactions, and the implications of electronic band structure in solids.

Biologik
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What determines of something absorbs light? Is it determined by the orbitals the electrons spin at, and what makes these two things special when other things like wood and metal don't
 
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It defiently has to do with the eletrons in the material. And how all the electrons affect each other ,
We don't have discrete orbitals in a complex material like wood or glass. As the photon comes in an oscillates the electron , The coulomb interaction between the electrons will dictate what light gets re-emitted . This might not be completely accurate but its a start and hopefully someone else can elaborate .
 
the absorption spectra of gases is determined by their orbitals.
with solids it gets complicated. you get effects like "electronic band structure" that single atoms don't really show
thats why there is a whole branch of physics called 'solid state physics'.

metals are a special case because they are conductors
I really don't know what makes glass (or water) so special.
 
Transparency to visible radiation is simply when there are no electronic transitions possible for the incoming radiation.
 

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