Albert Abraham Michelson,
The Relative Motion of the Earth and the Luminiferous Ether
(1881)
“ If, therefore, an apparatus is so constructed as to permit two pencils of light, which have traveled over paths at right angles to each other, to interfere, the pencil which has traveled in the direction of the earth's motion, will in reality travel of a wave-length farther than it would have done, were the earth at rest. ”
Albert Abraham Michelson,
The Relative Motion of the Earth and the Luminiferous Ether
(1881)
“ The undulatory theory of light assumes the existence of a medium called the ether, whose vibrations produce the phenomena of heat and light, and which is supposed to fill all space. According to Fresnel, the ether, which is enclosed in optical media, partakes of the motion of these media, to an extent depending on their indices of refraction. ”
Albert Abraham Michelson,
The Relative Motion of the Earth and the Luminiferous Ether
(1881)
“ I do not suppose that many would be disposed to maintain Fresnel's theory, when it is shown that it may be dispensed with, inasmuch as we would not be disposed to believe, without good evidence, that the ether moved quite freely through the solid mass of the earth. ”
