If I was on planet "a", and I pointed a laser at my friend on planet "b" which was 1 light year away, if I shook that laser back and forth would my friend see the mothion instantaniously or would it take a year for them to see it move?
If I pointed a beam of light out into the far ends of the universe, then i quickly turned it, would the farthest ends of the light pass an area faster than light?
If I pointed a beam of light out into the far ends of the universe, then i quickly turned it, would the farthest ends of the light pass an area faster than light?
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