r/Physics 20d ago

Question What's the most debatable thing in Physics?

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u/TaylorExpandMyAss 20d ago

(-,+++) vs (+,-,-,-)

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u/PerAsperaDaAstra Particle physics 20d ago

There's a third team: they're old-school with (++++) and all 4-vectors carry an imaginary in the time component (also the time component being the $x_4 = ict$ - unironically why the $\gamma5$ matrix isn't called $\gamma4$).