Tag Archives: Niels Bohr

Otto Stern and Walther Gerlach

The Stern-Gerlach Experiment

This experiment is often cited as demonstrating that angular momentum is quantised.  In fact it does nothing of the sort, and indeed it clearly demonstrates that it is not, at least not in the way that physicists would have you believe. The Stern Gerlach experiment was first carried out by German physicists Otto Stern(1888-1969) and […]

The Quantum Catechism

Over recent years much has been said about the similarities between religion and science.  Religion and science, and especially physics, it are said are on a convergent path.  The religious establishment is particularly fond of this idea, especially when spoken by a scientist, since it enhances their credibility, bolsters their position of authority and helps recruit […]

Retrospective Predictions!

Modern scientific enquiry aims to be as objective as possible.  The mechanism that has evolved to meet this requirement is called the Scientific Method.  The Scientific Method is predicated on the idea that new theories are developed based on a set of assumptions or postulates. To be useful the theory must be capable of making […]

Hydrogenic Atoms and the Bohr Model

As we move up the periodic table atoms get heavier. They do so because the nuclei of heavier atoms contain more protons.  In addition to the protons these heavier nuclei also contain another type of particle; the neutron, roughly equal in mass to the proton, but itself electrically neutral. So while the hydrogen atom comprises […]

Einstein and Bohr and the nature of reality

Perhaps the most important scientific debate of the 20th Century was that which took place between Niels Bohr and Albert Einstein during the 1930’s and 40’s. At issue was the very nature of reality. By that time Bohr had become convinced that the laws of physics had to be different on the scale of the […]

Schrödinger’s Quantum Stagecoach!

One of the most popular film genres of the 20th Century was the Cowboy or Western and one of the most popular themes in western movies was that of the stagecoach. The stagecoach provided movie makers with a powerful metaphor. Outside the environment was hostile, full of Indians or outlaws, hell bent on doing evil […]

Quantization of angular momentum ?

To date all models for the structure of the atom are based on a hypothesis first put forward by the British physicist John Nicholson in 1911.  Nicholson recognized that the units of Planck’s constant were those of angular momentum and so he reasoned that Planck’s constant was the angular momentum of the electron orbiting the […]