How quantum mechanics emerged in a few revolutionary ... of light emitted and absorbed by hydrogen atoms. The basic hydrogen atom is the simplest of all atoms, now known to consist of a single ...

The first gift that the digital quality of quantum mechanics gives to nature is the gift of stability: the quantum-mechanical hydrogen atom is stable. If the hydrogen atom obeyed the laws of ...

Everyone at that time imagined the atom as a "plum pudding ... of new ideas paved the way for the development of quantum mechanics. Bohr went on to make enormous contributions to physics and ...