Absorption of radiation at vibration frequency

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why is enerygy absorbed if the frequency of the radiation matches the frequency of the vibration?
 

Hootenanny

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asdf1 said:
why is enerygy absorbed if the frequency of the radiation matches the frequency of the vibration?
The simple answer is that energy transfer is most efficient when the frequency matches the natural frequency of the bond. Remember SHM and resonence? This is analogous, same princples apply.
 
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thank you very much!
 

Hootenanny

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