PK said:Quoted message said:Quoted message said:what color would your bike appear to be at the speed of light?
It would appear its usual colour to the rider, but *at* the
speed of light, bystanders would see it neither coming nor
going, witnessing only a bright blue flash of Cerenkov
[or Cherenkov] radiation as it whizzed past.it's a long time ago but...... Chereknov radiation is emitted
when a particle is travelling *faster* then the speed of light
in the medium
The medium is air, with an index of refraction [slightly] greater than
one, in which a light-speed object will emit Cerenkov radiation.
--
"No matter how fast light travels, it finds the darkness
has always got there first, and is waiting for it."
-- Terry Pratchett, "Reaper Man"