Coulombic 1 ⁄r potential .Stark - Coulomb potential for a Rydberg atom in a static electric field . Trajectory of the of the electron in a hydrogen atom in an electric field E → = − 3 × 10 6 x ^ {\displaystyle \scriptstyle {{\vec {E}}=-3\times 10^{6}{\hat {x}}}} A Classical simulation of the trajectory and angular momentum of the electron in a hydrogen atom in an electric field E → = − 3 × 10 6 x ^ {\displaystyle \scriptstyle {{\vec {E}}=-3\times 10^{6}{\hat {x}}}} <<Full size>> Second order Stark shifts in hydrogen. Each n-level consists of n-1 degenerate sublevels ; application of an electric field breaks the degeneracy. A graphical representation of the complex impedance plane . Note that while reactance X {\displaystyle \scriptstyle {\mathrm {X} }} resistance R {\displaystyle \scriptstyle {R}} An AC supply connected across a device with impedance Z {\displaystyle \scriptstyle {Z}} voltmeter and ammeter in parallel , and series respectively. An AC supply applying a voltage V {\displaystyle \scriptstyle {V}} Z {\displaystyle \scriptstyle {Z}} I {\displaystyle \scriptstyle {I}} Voltage and current phases for an ideal capacitor and inductor. An adiabatic process. Change in the probability density of a ground state quantum harmonic oscillator , due to an adiabatic increase in spring constant . An avoided energy level crossing in a two level system subjected to an external magnetic field . Repulsive force between two negatively charged lengths of tape. Attractive force between two oppositely charged lengths of tape. Fine and hyperfine structure in hydrogen. Not to scale. 
