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Suppose a hydrogen molecule passed to the first vibration-rotational energy level. What spectral line will be observed when it returns to the ground state?

Answer»


SOLUTION :The energy of the molecule on the first vibration-rotational level is
`epsi_(1)^(vib-rot)=epsi_(0)^(vib)+epsi_(1)^(rot)=(homega)/2+h^(2)/J`
The transition to the ZERO level results in the radiation of a PHOTON of energy `epsi_(ph)=epsi_(1)^(rot)=h^(2)//J`. Expressing the photon energy in terms of its wavelength, `epsi_(ph)=2pihc//lamda`, we obtain
`lamda=2piJc//h`


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