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I have always been comfortable with Quantum Mechanics' Shrodinger Equation but never made the jump to the relativistic QM formulation in my ( undergrad ) Physics education ( 45 yrs ago ).
I knew of the Klein-Gordon equation and PAM Dirac's contributions, but never really had a need for a relativistic interpretation.
Then I saw this guy's latest video, which explains how Klein-Gordon fails as a useful methodology, and introduces Dirac's matrix formulation.
I hope others will find this as enlightening as I did


The second part of this will delve into the prediction of anti-matter.

I love this guy's videos Physics Explained - YouTube for their ease of understanding and easy to follow mathematics.

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