The Best Speed Of Light Is Not Fixed Ideas. Web the speed of light has long been calculated to be 299,792.458 km per second, but now new research from france and germany indicates that light may not travel at a fixed rate after all, but instead can fluctuate. Web the speed of light may not be constant, a possibility that could have broad implications for fields of cosmology and even astronomy, say physicists.

This is a relative motion in two dimension. Web january 17, 2015 at 6:00 pm light doesn’t always travel at the speed of light. The speed of light is constant and does not depend on the speed of the light source.



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