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AngleWyrm said:If it comes back in the same amount of time that it took to go out, then something is amiss.
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According to any device that is moving at the same velocity as the experiment, that is exactly what would happen. Scientists tried to do something like that to determine the speed of the Earth as long ago as 1881 with the
most famous "failed" experiment ever. No matter what speed you are moving at, your perceptions of time and distance will conspire to give the same result.
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AngleWyrm said:Shouldn't the stars change color sleightly as the earth approaches them, and then as the earth pulls away? If earth's motion about the sun is about 29km/sec, or roughly 1% speed of light, then there should be a +/-1% red/blue shift in colorbands throughout the year.
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Yes. The speed of the light involved remains the same, however, no matter how much the light wave's frequency may change.