Word: appa
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Dates: during 1960-1969
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...wind, the light flashing across their lab floor should be slowed by 18.5 miles per second. Twelve hours later, the apparatus would be moving in the direction opposite to the earth's orbital motion, and light's speed should have been increased by the same amount. The appa ratus was crude by modern standards, but theoretically sensitive enough to detect this degree of change. No such effect was found. Light seemed to move at the same speed in all directions, regardless of the ether wind. So scientists had to abandon the concept of the luminiferous ether. Light...