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Sono brevemente sintetizzati i tentativi di sviluppare una teoria unificata della gravitazione e dell’elettromagnetismo e sono esposti alcuni dettagli di queste teorie basate su una varietà a cinque dimensioni. È dimostrato che il successo formale di queste teorie può essere dovuto ad una coincidenza e che ci vorrebbe un nuovo principio fisico affinchè altri tentativi su questa strada possano essere utili. È suggerito che un tale principio possa essere legato al concetto di osservatori dotati di carica, ma finché non si sa che cosa sia la carica elettrica è difficile formulare una tale teoria.

Summary

Attempts to develop a unified theory of gravitation and electromagnetism are briefly reviewed and some details are given of those theories based on a fivedimensional continuum. It is pointed out that the formal success of these theories may be due to chance and that a new physical principle is needed before other attempts in this direction could be useful. It is suggested that such a principle may be related to the concept of charged observers, but until one knows exactly what is the nature of electric charge it is difficult to formulate such a theory.

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Corben, H.C. Aspetti fisici delle teorie unitarie. Seminario Mat. e Fis. di Milano 23, 152–163 (1953). https://doi.org/10.1007/BF02922527

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