FT IR Spectroscopy
When radiation energy is absorbed by a spin 1/2 nucleus in a magnetic field, what happens?

None of these
The angle of precession flips so that the magnetic moment of the nucleus opposes the applied field
The nucleus spins faster
The processional frequency of the nucleus increases

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FT IR Spectroscopy
What is meant by rotating frame of reference?

That the sample is spun rapidly in the applied field
None of these
That the detector rotates around the sample
If the laboratory itself is imagined to be rotated at the Larmor frequency, viewing that individual magnetic moment vectors are fixed in space

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FT IR Spectroscopy
In scanning electron microscopy

None of these
a specimen is fixed and then coated with thin layer of a heavy metal
a specimen is fixed and then coated with transition metal
a specimen is not fixed and then coated with thin layer of a heavy metal

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