Arago (1810): the first experimental result against the ether

  title={Arago (1810): the first experimental result against the ether},
  author={Rafael Ferraro and Daniela Sforza},
  journal={European Journal of Physics},
Ninety five years before special relativity was born, Arago attempted to detect the absolute motion of the Earth by measuring the deflection of starlight passing through a prism fixed to the Earth. The null result of this experiment gave rise to Fresnel's hypothesis of an ether partly dragged by a moving substance. In the context of Einstein's relativity, the sole frame which is privileged in Arago's experiment is the proper frame of the prism, and the null result only says that Snell's law is… 
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