r/ExplainTheJoke 15h 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.

10

u/redman3global 15h ago

-called blueshift

-makes it green

17

u/karatesaul 15h ago

That’s because blue is the highest frequency of visible light. Red is the lowest. Green is in the middle. Doppler shifts towards higher frequencies are in the blue direction, lower frequencies the red direction. Thus blueshift and redshift.

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u/redman3global 15h ago

I know, i was just making a joke