Fig. 2. The structure and characteristics of hydrogen atom, and the connection between its electron and nucleus, where the electron’s Circular Magnetic Field (CMF-B2e) shown with green color is connected with the nucleus’s Spinning Magnetic Field (SMF-B1U) at two specific points; when the electron is excited, the energy transferred to another CMF-B2e shown with red color, which is immediately radiated as spectral line.