Studies suggest speed of light in a vacuum may not be constant

03/26/2013 | Christian Science Monitor, The

The speed of light in a vacuum has always been a constant measurement, but two studies suggest that it may vary slightly. In the first study, a research team at University of Paris-Sud concluded that the speed of light and other constants are "observable parameters of the quantum vacuum." The second paper suggests that the speed of light is dependent on the charge of the particles in the vacuum, rather than their masses.

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