Einstein (1906) akaratidza kuti inertia yesimba (mass-energy-equivalence) chinhu chinodiwa uye chinokwana kuchengetedza kwepakati pezvinyorwa. Panguva iyoyo, akacherechedza kuti zvinyorwa zvemasvomhu zvePoincaré pepa pamusoro pepakati pezvinyorwa (1900b) uye pepa rake pachake zvaive zvakafanana, kunyange zvazvo kududzirwa kwepanyama kwakanga kwakasiyana muchiedza chehukama.Kurd von Mosengeil (1906) kuburikidza nekuwedzera kuverenga kwaHasenöhrl kwechitema-muviri-radiation mune imwe nzvimbo, yakawana chirevo chakafanana chehuwandu hwakawedzerwa hwomuviri nekuda kweiyo electromagnetic radiation seHasenöhrl. Pfungwa yaHasenöhrl yaive yekuti huwandu hwemiviri yaisanganisira mupiro kubva kumunda wemagetsi, akafungidzira semuviri wehukama.
Muna 1906