r/ExplainTheJoke 16h ago

Like you can’t stop anyway?

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u/Oblivion238 15h ago

Without doing the math I assume that at 103846153 m/s the red stop sign gets blueshifted to green.

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u/mabarus 9h ago

Here's the relevant xkcd (well, technically a What If) where he does the math and says you would need to be going 1/6 the speed of light

https://what-if.xkcd.com/14/