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Why is the speed of light in a vacuum constant? Why does light never travel faster or slower than 299 792 458 m / s? By Dilip D James M.A., A(mus) T.C.L
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Speed of Light and the Principle of Relativity - Special and General Relativity - The Physics of the Universe
According to the Theory of Relativity, the speed of light is constant. Why is it that it has different speeds in air, a vacuum, glass, etc. (I know it's because of the
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