When the molecule makes a transition from its third to its second excited state, what is the wavelength of the emitted photon in units of microns $($mm $)?$

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m

lafevr$56$@rowan.edu$2$N$74-3$D$-11-41-$A$8$A$6-20626$

$$ Part $($a$)$

What is the vibrational frequency of this molecule in units of hertz?

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Hz