4 ms·

Nothing travels faster than light, not even information in any form.

• praptak 6y ago
  Nothing travels faster than c but light sometimes travels slower than that.
  • saagarjha 6y ago
    Always, unless you happen to have a way of making perfect vacuums ;)
    • praptak 6y ago
      That too, but I meant actual cases when it is possible to make things go faster than light in a given medium, see also Cherenkov radiation.