The relative motion of the Earth and of the luminiferous ether

  title={The relative motion of the Earth and of the luminiferous ether},
  author={Albert Abraham Michelson},
  journal={American Journal of Science},
  pages={120 - 129}
  • A. Michelson
  • Published 1 August 1881
  • Physics
  • American Journal of Science
THE undulatory theor.Y of light assumes the existence of a medium called the ethel', whose vibrations produce the phenomena of heat and light, and which is supposed to fill all space. According to Fresnel, the ethel', which is enclosed in optical media, partakes of the motion of these media, to an extent depending on their indices of refraction. For ail', this motion would be but a small fmction o£ that of the air itself and will be neglected . .Assuming then that the ether. is at rest, the… 
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