English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Alternative verifications of Klein's theorem and the proof of $E_0=mc^2$, fora relativistic macroscopic body are presented, using models with boundaryconditions of varying complexity, together with some refinements for the casecontaining electromagnetic radiation for the simplest model. The robustness ofthese models to the final result of $E_0=mc^2$, attests to the minor roleplayed by the Poincar\'e type stresses introduced in some of these models formechanical stability. Finally we caution the reader that while internalconsistency of the $E_0=mc^2$ relation for a macroscopic body in specialrelativity is proved, it does not in any way furnish a proof of the relationfor a single point particle, for this would imply that one is able to prove thepostulates of special relativity from the premises of the theory itself.

On the macroscopic verifications of Klein's theorem and the proof of $E_0=mc^2$