| 21. | In quantum field theory the sine-Gordon model contains a parameter, it can be identified with Planck constant.
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| 22. | Where h is the Planck constant, ? the optical frequency, ? the size of the velocity of light.
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| 23. | Such phenomena can also be considered from a wave viewpoint, by use of the reduced Planck constant \ hbar.
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| 24. | And if so . . . where does the wave function and the ubiquitous Planck constant " come " from?
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| 25. | Where is a densely defined self-adjoint operator, called the system imaginary unit and is the reduced Planck constant.
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| 26. | An example is found in the matrix mechanics introduced by unit matrix, where' is the reduced Planck constant.
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| 27. | At its 2011 meeting, the CGPM agreed in principle that the kilogram should be redefined in terms of the Planck constant.
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| 28. | Where c is the speed of light in a vacuum, is the gravitational constant, and is the reduced Planck constant.
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| 29. | Where is the energy outflow, is the reduced Planck constant, is the speed of light, and is the gravitational constant.
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| 30. | Where is the local acceleration, is the Boltzmann constant, is the reduced Planck constant, and is the speed of light.
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