Spencer Heath Archive

Item 2076

Pencil notes by Heath on a 3×5 card found at page 508 of Harlow Shapley et al, editors., A Treasury of Science.

Treasury of Science, pages 273-274

In the Michelson-Morley experiment the source of the light was fixed on the earth. Hence the velocity of its rays with respect to the earth was not affected by any change in the direction of the light’s rays — or of the earth’s motion.

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