△ E and magnet Strength Energy difference is proportional to the magnetic field strength △E=hw=yhB 2π Gyromagnetic ratio, Y, is a constant for each nucleus(26, 753 s-'gauss-1 for H In a 14,092 gauss field, a 60 MHz photon is required to flip a proton LoW energy, radio frequency > Chapter 13Chapter 13 6 E and Magnet Strength • Energy difference is proportional to the magnetic field strength. • E = h =  h B0 2 • Gyromagnetic ratio, , is a constant for each nucleus (26,753 s-1gauss-1 for H). • In a 14,092 gauss field, a 60 MHz photon is required to flip a proton. • Low energy, radio frequency. =>