31 dic 1884 anni - Niels Bohr
Descrizione:
In 1913, Niels Bohr proposed a theory for the hydrogen atom based on quantum theory that energy is transferred only in certain well-defined quantities. Electrons should move around the nucleus but only in prescribed orbits. When jumping from one orbit to another with lower energy, a light quantum is emitted.Aggiunto al nastro di tempo:
Data:
31 dic 1884 anni
Adesso
~ 139 years ago
