▁Lor ent z ▁and ▁Abraham ). ▁And ▁using ▁the ▁elect romagnet ic ▁momentum , ▁he ▁could ▁explain ▁the ▁negative ▁result ▁of ▁the ▁Tr out on – No ble ▁experiment , ▁in ▁which ▁a ▁charged ▁parallel - plate ▁capac itor ▁moving ▁through ▁the ▁a ether ▁should ▁orient ▁itself ▁per pend icular ▁to ▁the ▁motion . ▁Also ▁the ▁experiments ▁of ▁Ray le igh ▁and ▁Bra ce ▁could ▁be ▁explained . ▁Another ▁important ▁step ▁was ▁the ▁post ulate ▁that ▁the ▁Lor ent z ▁transformation ▁has ▁to ▁be ▁valid ▁for ▁non - elect rical ▁forces ▁as ▁well . ▁ ▁At ▁the ▁same ▁time , ▁when ▁Lor ent z ▁worked ▁out ▁his ▁theory , ▁Wien ▁( 1 9 0 3 ) ▁recognized ▁an ▁important ▁consequence ▁of ▁the ▁velocity ▁dependence ▁of ▁mass . ▁He ▁argued ▁that ▁super l um inal ▁veloc ities ▁were ▁impossible , ▁because ▁that ▁would ▁require ▁an ▁infinite ▁amount ▁of ▁energy   — ▁the ▁same ▁was ▁already ▁noted ▁by ▁Thom son ▁( 1 8 9 3 ) ▁and ▁S ear le ▁( 1 8 9 7 ). ▁And ▁in ▁June ▁ 1 9 0 4 , ▁after ▁he ▁had ▁read ▁Lor ent z ' s ▁ 1 9 0 4 ▁paper , ▁he ▁noticed ▁the ▁same ▁in ▁relation ▁to ▁length ▁contra ction , ▁because ▁at ▁super l um inal ▁veloc ities ▁the ▁factor ▁ ▁becomes ▁imag inary . ▁ ▁Lor ent z ' s ▁theory ▁was ▁critic ized ▁by ▁Abraham , ▁who ▁demonstrated ▁that ▁on ▁one ▁side ▁the ▁theory ▁ob e ys ▁the ▁relativ ity ▁principle