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Moose352
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I keep reading that the Bohr model explained why the electron in orbit around the nucleus does not emit radiation even though it is accelerating. How does the Bohr model explain this?
Moose352 said:I keep reading that the Bohr model explained why the electron in orbit around the nucleus does not emit radiation even though it is accelerating. How does the Bohr model explain this?
Think of the postulates that Albert Einstien proposed in his special theory of Relativty; stating that speed of light is constant if measured from any referance frame.
Integral said:Albert Einstein was born within a few years of the completion of the Michelson Morely experiment. For his entire life the speed of light was known to be constant, and further, that there was no ether to propagate it. It was a known, but distressing, fact to all Physicists of the day. Einstein simply showed them how to square the constant velocity of Electro Magnetism with the rest of Mechanics.
Einstein only postulated that which was already accepted Physics. It is a very dangerous thing to have a postulate which is not part of accepted Physics. It is that sort of thing that should be derived from known postulates. If your postulate are not understood, how can your results have meaning? Thus the questionable postulate of Bohr lead to an incorrect model.
reilly said:The problem of 1. atomic stability, and 2. discrete atomic spectra drove physicists absolutely nuts, until Bohr. His great insight was to accept as fact that "orbiting" electrons did not radiate. Given that, and acceptance of photons, as described by Einstein, Bohr was able to derive the formula for the Balmer series, and other hydrogen spectral series. Bohr started modern atomic physics, and, as a result, his work led to an explanation of the periodic table, and on-and-on.
To say that Bohr provided us with an "incorrect model", as suggested by Integral, is like saying the first motion pictures were 'wrong' because they did not have sound, or that Adam Smith was wrong because he did not anticipate modern economies, or that Newton was wrong, or Maxwell was wrong -- they never got to quantum effects. And, the planetary model of Rutherford was really wrong, yet it survived, if only as a metaphor.
The Bohr model is a simplified representation of an atom proposed by Niels Bohr in 1913. According to this model, electrons orbit the nucleus in circular paths at specific energy levels. The acceleration of electrons is explained by the fact that they are constantly changing their direction as they move around the nucleus, resulting in a centripetal force that causes their acceleration.
The acceleration of electrons is important in the Bohr model because it helps to explain how electrons are able to maintain their specific energy levels and not spiral into the nucleus. The balance between centripetal force and electrostatic force keeps the electrons in stable orbits.
The Bohr model differs from other atomic models, such as the classical model and the quantum mechanical model, in that it introduces the concept of quantized energy levels for electrons. This means that electrons can only exist in certain energy states, and they do not continuously lose energy as they orbit the nucleus, as predicted by classical physics.
No, the Bohr model cannot accurately predict the acceleration of electrons in all atoms. It is a simplified model that only applies to atoms with a single electron, such as hydrogen. For atoms with multiple electrons, the Bohr model is not able to accurately predict their behavior and more complex models, such as the quantum mechanical model, are needed.
Our understanding of electron acceleration has significantly changed since the development of the Bohr model. The Bohr model was a major step in understanding the structure of atoms, but it has been expanded upon and refined by newer models, such as the quantum mechanical model. We now know that electrons do not orbit the nucleus in fixed paths, but rather exist in probability clouds around the nucleus. Additionally, the concept of quantized energy levels has been further developed and incorporated into our understanding of atomic structure.