Question

46. Electromagnetic radiation interacts with matter through interactions with electrons and nuclei. Which of the following spectroscopic techniques does electromagnetic radiation interact with nuclei? a UV-Vis spectroscopy Atomic emission spectroscopy Fluorescence spectroscopy NMR spectroscopy B and C.

Answer 1

Lets check each option to see if the electromagnetic radiation interacts with nuclei.

a) UV-VIS spectroscopy

In UV-VIS spectroscopy, the light is absorbed by the ground electronic state of molecules in the sample that goes to the excited electronic states.

Hence, the electromagnetic radiation do not interact with nuclei.

Hence, it is not the correct option.

b)Atomic emission spectroscopy

Here, the electromagnetic radiation interacts with the electrons which undergoes transition to different energy levels. Depending on sample, it results in different colors.

Hence, it also does not involve interaction with nuclei.

Hence, it is not the correct option.

c)Fluorescence spectroscopy

Here, the excited state molecules release their energy in the form of photons to come to the ground electronic state.

Hence, it also do not involve the nuclei.

Hence, it is also not the correct option.

d) NMR spectroscopy

It involves interaction of radiowaves with the nuclear spin states of the molecule. The resulting precession of the spin results in meaningful data about the nature of the sample.

Hence, it does involve electromagnetic radiation interacting with nuclei.

Hence, it is the correct choice.

Hence, the correct choice is option d). NMR spectroscopy.