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by zonidjan 2444 days ago
So... you're saying E=mc^2 is false? Huh, who woulda thunk it.
2 comments
gpderetta 2444 days ago
IANAP, but as far as I know it is true only if m is the relativistic mass which apparently is an obsolete and confusing concept which is not taught anymore (according to Wikipedia Einstein himself disliked it). Otherwise the formula only holds at rest.
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semajian 2444 days ago
Yes, well said.
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antonvs 2443 days ago
It's a simplified equation which only fully applies in the case where momentum is zero.

The full equation[1] is:

    E^2 = (pc)^2 + (m0 c^2)^2
...where p is momentum, and m0 is rest mass (mass in the rest frame of the object.)

[1] https://en.wikipedia.org/wiki/Mass%E2%80%93energy_equivalenc...

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