AN ocN epa oN aN N XX cN o iN N N N a ae e N p o a a N N apcN N xo o : Yi aco, o c, pe . N e pN ocN aN e , N i a a N pa N i i N N e N , o a caN A N epN a E N N e a - e iN , N o epe ep N aN e po N i N N i . N i N e e N N a N a o opo oN a acN 1895 po N , o N icN a N N N piN A N epN ocN a co i N a N : N o o aN o, N N o eN iN e o opN N i po e e c iN a. A e N epe 20 po i cN op o N a pac iN x N eopi icN opiN aN - a a N N N eopiNZ i oc ocN i - N a i a i o iN e pi N N E = mc 2.
