4. An alternative development of the Bohr theory begins by assuming that the stationary states are those for which the circumference of the orbit is an integral number of de Broglie wavelengths. (a) Show that this condition leads to standing de Broglie waves around the orbit. (b) Show that this condition gives the angular momentum mvr = nh , used in the Bohr theory.

4. An alternative development of the Bohr theory begins by assuming that the stationary states are those for which the circumference of the orbit is an integral number of de Broglie wavelengths. (a) Show that this condition leads to standing de Broglie waves around the orbit. (b) Show that this condition gives the angular momentum mvr = nh , used in the Bohr theory.