How does de Broglie's hypothesis explain the stability of electron orbits in Bohr's atom? How does making them standing waves mean the electrons don't accelerate any more and don't emit radiation?
I understand how it means that the electrons reside in quantised energy levels, as they can be considered to be standing waves (why standing waves, not another type of wave?), in which case the circumference of orbit is an integer number of wavelengths (and thus Bohr's quantised angular momentum).