# Electric charge is lorentz invariant

I know that electric charge is lorentz invariant quantity and I can easily think of experiment to check that. Is a though experiment that can prove that also?

• Even thought experiments are based on $some$ experimental facts. So if you could find example of a thought experiment from which the Lorentz invariance of electric charge could be derived, still it would be a consequence of $some$ experimental fact. – Ján Lalinský Jan 16 '14 at 13:49