This item is in two parts. The first part is a text based discussion of the
Bohr model of hydrogen. Included is a link to a mathematical appendix that
contains the basis for a derivation of energy levels and radii.
The second part of the item is a "simulation" of the Bohr model of
the hydrogen atom. The simulation can display either particle or wave aspects
of the Bohr atom. In the particle mode one sees the various orbits at the
relative radii for the chosen principle quantum numbers. In the wave mode you see the deBroglie standing wave superposed on the circular orbit trajectory. The user may choose which principle quantum number to display. In wave mode the
user may shift the orbital radius and see that the deBroglie wave only forms a standing wave at the appropriate radii corresponding to the principle quantum
The energy and the classical radius of the orbit are automatically calculated as
you change principle quantum numbers. A typical energy level diagram is
displayed with the energy of level of the current quantum number choice
Overall, much of the information presented is a text page with the addition of a
The text discusses background and assumptions used to develop the Bohr model.
The concepts displayed by using the animation can help users understand how this
model was developed.