Ciro Santilli
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Relativistic version of the Schrodinger equation, but has some problems, which the Dirac equation solves:
  • it has a second time derivative of the wave function. Therefore, to solve it we must specify not only the initial value of the wave equation, but also the derivative of the wave equation,
  • the modulus of the wave function is not constant and therefore not always one, and therefore cannot be interpreted as a probability density anymore
  • since we are working with the square of the energy, we have both positive and negative value solutions. This is also a features of the Dirac equation however.
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What it does well however, is to describe spin=0 particles.
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Ancestors

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