How would a planetary (solar system) model of the atom differ from a key assumption in Bohr's model? What was the theoretical basis from which Bohr made his assumption?

Question

anonymous · Answer

In a planetary model of a atom,an electron will be able to revolve in any orbit around the nucleus depending on its energy but in Bohr's model of atom it is assumed that electron can only revolve in this orbits in which its angular momentum about the nucleus is an integral multiple of (h/2pi)......where h is the planck's constant.
Bohr was forced to make this assumption or else the model would have failed because according to Maxwell's classical electromagnetic theory,an accelerated charge particle must radiate energy continuously.The electron is accelerated as it is moving in a circle,so it must radiate energy and if it would have been the case,then an atom will collapse.
So bohr made this assumption that electrons revolve in these orbitals and they do not radiate energy while revolving in these selected orbits