•Imagine a charge travelling circularily about an axis builds up a magnetic moment
•It rotates (spins) about its own axis (the blue arrow) and precesses
about the axis of the magnetic field B (the red arrow). The frequency of the precession (w) is proportional to
the strength of the magnetic field:
•w = g B0
g= magnetogyro ratio
g Magnetic field mrasured in Tesla
g 1 T = 10,000
gauss
The Physical Basis of the
NMR Experiment