well ▁( 1 8 6 4 ) ▁developed ▁an ▁accurate ▁theory ▁of ▁elect romagnet ism ▁by ▁der iving ▁a ▁set ▁of ▁equations ▁in ▁electric ity , ▁magnet ism ▁and ▁induct ance , ▁named ▁Max well ' s ▁equations . ▁He ▁first ▁proposed ▁that ▁light ▁was ▁in ▁fact ▁und ulations ▁( elect romagnet ic ▁radiation ) ▁in ▁the ▁same ▁a ether ial ▁medium ▁that ▁is ▁the ▁cause ▁of ▁electric ▁and ▁magnetic ▁phen omena . ▁However , ▁Max well ' s ▁theory ▁was ▁uns atisf actory ▁regarding ▁the ▁opt ics ▁of ▁moving ▁bodies , ▁and ▁while ▁he ▁was ▁able ▁to ▁present ▁a ▁complete ▁mathematical ▁model , ▁he ▁was ▁not ▁able ▁to ▁provide ▁a ▁coh er ent ▁mechanical ▁description ▁of ▁the ▁a ether . ▁ ▁After ▁Heinrich ▁H ert z ▁in ▁ 1 8 8 7 ▁demonstrated ▁the ▁existence ▁of ▁elect romagnet ic ▁waves , ▁Max well ' s ▁theory ▁was ▁widely ▁accepted . ▁In ▁addition , ▁Oliver ▁He av is ide ▁and ▁H ert z ▁further ▁developed ▁the ▁theory ▁and ▁introduced ▁modern ized ▁versions ▁of ▁Max well ' s ▁equations . ▁The ▁" Max well - H ert z " ▁or ▁" He av is ide - H ert z " ▁equations ▁subsequently ▁formed ▁an ▁important ▁basis ▁for ▁the ▁further ▁development ▁of ▁elect rod ynam ics , ▁and ▁He av is ide ' s ▁notation ▁is ▁still ▁used ▁today . ▁Other ▁important ▁contributions ▁to ▁Max well ' s ▁theory ▁were ▁made ▁by ▁George ▁Fitz G er ald , ▁Joseph ▁John ▁Thom son , ▁John ▁Henry