loading...| Preferred Name | BondedObject | |
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| Definitions |
"... in the 'classical' picture ordinary matter is made of atoms, in which electrons are held in orbit around a nucleus of protons and neutrons by the electrical attraction of opposite charges. We can now give this model a more sophisticated formulation by attributing the binding force to the exchange of photons between the electrons and the protons in the nucleus. However, for the purposes of atomic physics this is overkill, for in this context quantization of the electromagnetic field produces only minute effects (notably the Lamb shift and the anomalous magnetic moment of the electron). To excellent approximation we can pretend that the forces are given by Coulomb's law (together with various magnetic dipole couplings). The point is that in a bound state enormous numbers of photons are continually streaming back and forth, so that the "lumpiness" of the field is effectively smoothed out, and classical electrodynamics is a suitable approximation to the truth. But in most elementary particle processes, such as the photoelectric effect or Compton scattering, individual photons are involved, and quantization can no longer be ignored." D. Griffiths, "Introduction to elementary Particles", Wiley-VCH, 2004, pp.16-17 A bonded object is a sequence of fundamental interactions that can be described approximatively by Schrodinger formulation. A bonded object is typically characterised by having quantum states (e.g. electron states in an atom, energy levels of a molecule). Furthermore, a bonded object is made of elementary particles that travels from the beginning to the end of the entity (i.e. a bonded object doesn't change its components). |
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| ID |
https://w3id.org/emmo#EMMO_801395f8_948e_4637_ac3b_5fcd587d72ca |
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| comment |
"... in the 'classical' picture ordinary matter is made of atoms, in which electrons are held in orbit around a nucleus of protons and neutrons by the electrical attraction of opposite charges. We can now give this model a more sophisticated formulation by attributing the binding force to the exchange of photons between the electrons and the protons in the nucleus. However, for the purposes of atomic physics this is overkill, for in this context quantization of the electromagnetic field produces only minute effects (notably the Lamb shift and the anomalous magnetic moment of the electron). To excellent approximation we can pretend that the forces are given by Coulomb's law (together with various magnetic dipole couplings). The point is that in a bound state enormous numbers of photons are continually streaming back and forth, so that the "lumpiness" of the field is effectively smoothed out, and classical electrodynamics is a suitable approximation to the truth. But in most elementary particle processes, such as the photoelectric effect or Compton scattering, individual photons are involved, and quantization can no longer be ignored." D. Griffiths, "Introduction to elementary Particles", Wiley-VCH, 2004, pp.16-17 |
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| conceptualisation |
A bonded object is a sequence of fundamental interactions that can be described approximatively by Schrodinger formulation. A bonded object is typically characterised by having quantum states (e.g. electron states in an atom, energy levels of a molecule). Furthermore, a bonded object is made of elementary particles that travels from the beginning to the end of the entity (i.e. a bonded object doesn't change its components). |
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| definition |
"... in the 'classical' picture ordinary matter is made of atoms, in which electrons are held in orbit around a nucleus of protons and neutrons by the electrical attraction of opposite charges. We can now give this model a more sophisticated formulation by attributing the binding force to the exchange of photons between the electrons and the protons in the nucleus. However, for the purposes of atomic physics this is overkill, for in this context quantization of the electromagnetic field produces only minute effects (notably the Lamb shift and the anomalous magnetic moment of the electron). To excellent approximation we can pretend that the forces are given by Coulomb's law (together with various magnetic dipole couplings). The point is that in a bound state enormous numbers of photons are continually streaming back and forth, so that the "lumpiness" of the field is effectively smoothed out, and classical electrodynamics is a suitable approximation to the truth. But in most elementary particle processes, such as the photoelectric effect or Compton scattering, individual photons are involved, and quantization can no longer be ignored." D. Griffiths, "Introduction to elementary Particles", Wiley-VCH, 2004, pp.16-17 A bonded object is a sequence of fundamental interactions that can be described approximatively by Schrodinger formulation. A bonded object is typically characterised by having quantum states (e.g. electron states in an atom, energy levels of a molecule). Furthermore, a bonded object is made of elementary particles that travels from the beginning to the end of the entity (i.e. a bonded object doesn't change its components). |
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BondedObject |
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| prefixIRI |
EMMO_801395f8_948e_4637_ac3b_5fcd587d72ca |
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| prefLabel |
BondedObject |
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