19 1 1 year, British physicist Rutherford put forward a planetary model of atomic structure according to the scattering experiment of α particles conducted in 19 1 year. In this model, electrons revolve around the nucleus, just like the planets in the solar system revolve around the sun. But according to the classical electromagnetic theory, such electrons will emit electromagnetic radiation, lose energy, and even collapse into nuclei in an instant. This is inconsistent with the actual situation, and Rutherford can't explain this contradiction.
19 12 years, Bohr, who was working at the University of Manchester, England, submitted an outline of his thesis called Rutherford Memorandum to his tutor Rutherford. In this outline, Bohr introduced Planck's quantum concept on the basis of planetary model, and thought that the electrons in atoms were in a series of discrete steady states. After returning to Denmark, Bohr was eager to organize these ideas into a paper, but made little progress.
19 13 One day around February 4th, Bohr's colleague Hansen visited him and mentioned 1885 the work of Swiss math teacher balmer and balmer's formula. Bohr was immediately inspired. Later, he recalled, "The moment I saw balmer's formula, everything suddenly became clear." "It was like the last piece in a jigsaw puzzle." This event is called Bohr's "February Transition".
19 13 July, September, 165438+ October, recommended by Rutherford, Philosophy magazine published three consecutive Bohr's papers, which marked the formal proposal of Bohr model. These three papers have become classics in the history of physics and are called the "trilogy" of Bohr model.