english: So he imagined that the world had four dimensions of space, not three, and imagined that electromagnetism was warps and curves in that fourth dimension. Now here's the thing: when he wrote down the equations describing warps and curves in a universe with four space dimensions, not three, he found the old equations that Einstein had already derived in three dimensions -- those were for gravity -- but he found one more equation because of the one more dimension.
non_english: Tako je zamislio svet sa četiri prostorne dimenzije, umesto tri i kako elektromagnetizam stvara zakrivljenja te četvrte dimenzije. Stvar je sada u sledećem: kada je stavio jednačine na papir, one koje opisuju zakrivljenja četvorodimenzionog prostora, dobio je iste one jednačine koje je Ajnštajn već ustanovio za trodimenzioni prostor, odnosno one za gravitaciju, ali je dobio još jednu jednačinu, zbog još jedne dimenzije.