Question

How is a spectrum obtained in NMR spectroscopy?

A. Low-frequency radio waves bombard the atom and cause nuclei in a low spin state to move to a higher spin state.
B. High-frequency ultraviolet rays bombard the atom and cause nuclei in a high spin state to move to a lower spin state.
D. Low-frequency ultraviolet rays bombard the atom and cause nuclei in a low spin state to move to a higher spin state.

Is the answer b

Answer 1

I think the answer is A, but I am not sure. I believe that Low frequency radio waves are used, which eliminates answer choices B and D, which should be answer choice C. I have used NMR is performing research, but I never had to know the type of frequency used nor did I care to know.

Good question.

Answer 2

I think B and D are eliminated because of the "ultraviolet rays" part of the answer. The nuclei are irradiated by VHF or UFH RADIO frequency as per this site. High and low are relative terms but I think of UHF and VHF as high. Here's the site. And I don't see answer choice c.

Answer 3

http://en.wikipedia.org/wiki/Nuclear_magnetic_resonance

Answer 4

That last part of my sentence should have said, "D should be answer choice C."

Answer 5

just took the quiz, the answer was A :)