Glass Transparency: Visible Light vs. IR/UV

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Homework Statement


Why is glass transparent to visible light but not infrared/UV?

Homework Equations


The Attempt at a Solution


I know that it is opaque to UV and transparent to visible light because the higher photons are absorbed by the glass's electrons therefore letting the visible light pass through...

what happens with the IR light?

I was thinking it could be because the frequency of the IR light is equal to the vibrational frequency of the glass's electrons, therefore the glass would absorb the IR?
Thanks
 
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