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  4. In which one of the following regions of the electromagnetic spectrum will the vibrational motion of molecules give rise to absorption?

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Q. In which one of the following regions of the electromagnetic spectrum will the vibrational motion of molecules give rise to absorption?

CMC MedicalCMC Medical 2007

Solution:

Molecular spectra due to vibraiional motion lies in the microwave region of electro magnetic spectrum. Due to Kirchhoffs law in spectroscopy the same will be absorbed.