Relativity and Cosmology


One Way Speed Of Light Based on Wineland's Laser Cooling Experiment

Authors: Eric Su

Based on David Wineland's experiment in 1978, a laser beam points at an electromagnetcally trapped magnesium ion. The frequency of the laser light in the rest frame of the laser becomes a different frequency in the rest frame of the ion. If this new frequency matches the absorption frequency of the ion, the light will be absorbed by the ion. The wavelength is independent of reference frame. Therefore, the faster the ion moves toward the laser, the higher the frequency detected by the ion will be.

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[v1] 2018-09-20 02:13:47

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