This indicates the magnetic potential energy of hydrogen atom.
When an atom receives energy from a fixed hv photon, it will only raise its energy level to a certain point. However if you apply a magnetic field specially a varying magnetic field, like inside a resonant coil, you create different levels of absorption of photon energy. This could makes the electrons to goes to outer orbits and finally ejects... Maybe electric fields also makes the same thing.
The water form a double layer with electrodes 10 angstrons thick where 0,5 volts is distributed forming an electric field of 5 Million Volts/cm at each electrode in contact with water. This is basic electrochemistry of fuel cells. see double layer. The big problem is that this electric field is in counter action with the applied field and is the reason for many of the kinetic limitations of the electrode water interface.
