z2210558
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Joined 11 years ago
c.f. https://en.wikipedia.org/wiki/Radio_T%C3%A9l%C3%A9vision_Lib...
Why only dictatorships?
Light from the rear red shifts (each photon has less energy), and there are fewer as some of the (formerly incident) photons "rotated" to the front.
(edit: typo)
(edit: didn't read the question closely, this is about approaching c, not exceeding it)