Comments by "David Elliott" (@davidelliott5843) on "The Slow Mo Guys" channel.

  1. If they can go fast enough, we might be able to see individual waves within the light beam
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  2. We need to see a light shining from a train. It it really true that light speed does not add to the train speed?
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  3. If light really could not travel through a vacuum, there would be no temperature difference between light & shade in space and earth would be frozen solid.
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