I heard that If anything travels at the speed of light space time warps ; then what about light...

I heard that If anything travels at the speed of light space time warps ; then what about light...
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answer:Maybe in the universe you design this should be so, but it’s not in the one we share. Light travels at a certain speed (in what we consider the “vacuum” of space—and which may not be so vacuous after all), and then it travels at different speeds as it enters air, water, glass, etc. That’s just the way it is.
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