- #1
ns_phonon
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People normally talk of electrons performing oscillatory motion when an electromagnetic field is incident on an atom.
But, won't the electric field of the E.M. wave cause the nucleus of the atom to vibrate...?
. "Note: Here I am talking of isolated atoms, that is atoms of noble gases, and not of molecules."
Please don't explain me the infrared absorption of light by molecules like CO2.
I understand that nucleus' mass is very high compared to electrons but even then won't it vibrate, with a very small amplitude or frequency...?
And if the the nucleus vibrates then we must think that vibrating positive charge of the nucleus will re-emit the radiation in all directions according to principles of electrodynamics.
But I have never heard of people talking of re-emission of electromagnetic radiation from nucleus. "People only talk of when a non-resonant light wave impinges upon an atom,it sets electrons of atoms vibrating and consequently they(electrons) re-emit this energy in the form of E.M. radiation in all direction according to a principle of electrodynamics." .
No one talks of re-emission of E.M. wave from a vibrating nucleus,oscillating with a much less amplitude than electrons......
Why Why Why![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
But, won't the electric field of the E.M. wave cause the nucleus of the atom to vibrate...?
. "Note: Here I am talking of isolated atoms, that is atoms of noble gases, and not of molecules."
Please don't explain me the infrared absorption of light by molecules like CO2.
I understand that nucleus' mass is very high compared to electrons but even then won't it vibrate, with a very small amplitude or frequency...?
And if the the nucleus vibrates then we must think that vibrating positive charge of the nucleus will re-emit the radiation in all directions according to principles of electrodynamics.
But I have never heard of people talking of re-emission of electromagnetic radiation from nucleus. "People only talk of when a non-resonant light wave impinges upon an atom,it sets electrons of atoms vibrating and consequently they(electrons) re-emit this energy in the form of E.M. radiation in all direction according to a principle of electrodynamics." .
No one talks of re-emission of E.M. wave from a vibrating nucleus,oscillating with a much less amplitude than electrons......
Why Why Why