Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: inova yokufungidzira. Dzidziso yaLorentz yakashorwa naAbraham, uyo akaratidzira kuti parutivi rumwe dzidziso yacho inoteerera nheyo youkama, uye parumwe rutivi mavambo emagetsi esimba ose anofungidzirwa. Abraham, akaratidza kuti fungidziro dzose dziri mbiri dzakanga dzisingawirirani, nemhaka yokuti mupfungwa yaLorentz yemagetsi akapfupikiswa, masimba asiri emagetsi aidiwa kuitira kuvimbisa kugadzikana kwenyaya. Zvisinei, mupfungwa yaAbrahama yeerekitironi yakaoma, hapana masimba akadaro aidavirwa. Nokudaro mubvunzo wakamuka kana pfungwa yeElectromagnetic yenyika (inowirirana nedzidziso yaAbrahama) kana kuti nheyo yeRelativity (inowirirana neTheory yaLorentz) yakanga yakarurama. Mumharidzo yaSeptember 1904 muSt. Louis inonzi The Principles of Mathematical Physics, Poincaré akawana mimwe migumisiro kubva pane dzidziso yaLorentz uye akatsanangura (mukuchinja kweGalileo's Relativity Principle uye Lorentz's Theorem of Corresponding States) nheyo inotevera: "Nheyo yeRelativity, maererano nemitemo yezvinhu zvepanyama inofanira kuva yakafanana kune mucherechedzi akamira uye kune imwe inotakurwa pamwe chete mukufamba kwakaringana kwekushandura, kuitira kuti isu tisina nzira, uye hatigoni kuva nayo, yekugadzirisa kana kuti hatisi kutakurwa pamwe chete mukufamba kwakadaro". Akatsanangurawo nzira yake yokuronga nguva yewachi uye akatsanangura mukana we"nzira itsva" kana kuti "maitiro matsva", umo pasina kumhanya kunogona kudarika kwechiedza nokuda kwavose vanocherechedza. Zvisinei, akacherechedza nenzira yokutsoropodza kuti Mutemo weRelativity, chiito naNewton, kuchengetedzwa kwehuwandu, uye kuchengetedzwa kwesimba hazvisati zvasimbiswa zvizere uye zvinototyisidzirwa nedzimwe ongororo. Zvakare Emil Cohn (1904) akaramba achivandudza muenzaniso wake wakasiyana (sezvakatsanangurwa pamusoro), uye achienzanisa dzidziso yake neiyo yaLorentz, akawana dzimwe tsanangudzo dzinokosha dzepanyama dzeshanduko dzaLorentz. Iye akaenzanisira (saJoseph Larmor mugore rimwe chetero) kushanduka uku achishandisa tsvimbo nemawachi: Kana ivo vakazorora muether, vanoratidza chokwadi...  Mubvunzo: Inyaya ipi inotaura kuti hapana simba rinodiwa?
Dzidziso yaAbrahama yeelektroni yakaoma