Why does the [itex] \psi [/itex] of the Dirac equation return four complex numbers instead of one, as in the Schrodinger equation? I know it has something to do with spin, but I'm not finding a clear answer to this question in my sources. What do these four complex numbers represent?(adsbygoogle = window.adsbygoogle || []).push({});

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# Interpreting the Dirac equation

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