E=mc^2 Proof: Is it OK? - Adam Aulton

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    E=mc^2 Proof
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SUMMARY

The discussion centers on the validity of the reasoning presented by Adam Aulton regarding the equation E=mc². The argument, based on Einstein's thought experiment, asserts that the energy of radiation confined in a box contributes to the box's rest mass, supporting the conservation of energy and momentum. However, participants agree that this reasoning does not universally prove E=mc² as an absolute equation, highlighting the distinction between valid reasoning and universal proof.

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I don't know that I would call it a "proof", exactly, but the reasoning described in the post, which is based on a well-known thought experiment of Einstein's, is valid, at least as far as establishing that the energy of radiation confined in a box must contribute to the rest mass of the box in order for energy and momentum to be conserved. But that doesn't necessarily establish ##E = m c^2## as a universally valid equation.
 

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