When Dirac solved his equation for electron, he found out there are negative energy states.(adsbygoogle = window.adsbygoogle || []).push({});

My question is why electrons won't jump from positive energy state to negative energy states and release energy as photon?

Dirac proposed that all negative energy states have been filled so electrons can't jump to negative energy states. It's clearly contrived

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# Negative energy in Dirac equation

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