Exercise for the reader: Assuming average human eyesight, how many picoseconds away from a collision are you if you can read that size of text and the relative velocity between you and the car ahead of you is large enough that the red label is sufficiently blueshifted to look blue?
Exercise for the reader: Assuming average human eyesight, how many picoseconds away from a collision are you if you can read that size of text and the relative velocity between you and the car ahead of you is large enough that the red label is sufficiently blueshifted to look blue?
for 800nm to 400nm, we need gamma=2. So v~.86c. At 20m this gives you ~80ns.
For perspective, this speed is:
In one second, you would travel around:
Which is around 6.43 times around the Earth’s equator.
It was a graveyard graph.
He caught up in a flash!