Community > Recent Posts By User > aLittleBird

I always advise people never to give advice.

There is only one way to achieve happiness on this terrestrial ball, and that is to have either a clear conscience or none at all.

im not i blocked him

something illegal......smoking pot is illegal i wouldnt say its immoral tho.


And

Immoral, sometimes you cant help it.

In 1913 Niels Bohr showed how the new quantum theory could explain the solar spectral lines which had puzzled Fraunhofer almost a century before. Bohr constructed a quantum model of the hydrogen atom which still has explanatory power even today. In the Bohr atomic model the electrons orbit the nucleus (i.e., a single proton for hydrogen) in discrete circular orbits. The lowest orbit has quantum number N = 1, the second lowest orbit has quantum number N = 2, and so forth. The higher the N number the greater the energy the electron possesses. When an electron falls from a higher orbit to a lower orbit it produces a photon of light whose energy is the energy difference in the orbits. An electron can climb to a higher energy orbit by absorbing a photon whose energy equals the energy difference in the orbits. Thus, the Bohr model could explain discrete energies (i.e., wavelengths) for emitted or absorbed light and thus the solar spectral lines.

Bohr also postulated what he called the Correspondence Principle which said that in the limit as N goes to infinity the predictions of quantum theory and classical theory must agree. Thus, classical physics is nothing but a derivation of quantum physics for large quantum numbers. Planck, Einstein, and Bohr produced what is known as the Old Quantum Mechanics which was a complete theory by the year 1915. But it was soon to be eclipsed by the New Quantum Mechanics in a few short years. I will have more to say about the New Quantum Mechanics in a future post.