Consider two cars going in opposite direction one at speed $c/2$ and other just greater than $c/2$, then one bus will appear to other moving at speed more than $c$. How can an object travel at speed more than light?


marked as duplicate by John Rennie, Valter Moretti, Brandon Enright, David Z Mar 5 '14 at 8:32

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  • $\begingroup$ It can't. You need to use relativistic velocity addition formulas or Lorentz transformations. You are thinking classically (Galilean) but asking a relativistic problem. Check this out hyperphysics.phy-astr.gsu.edu/hbase/relativ/einvel.html $\endgroup$ – jerk_dadt Mar 5 '14 at 7:46
  • $\begingroup$ The duplicate I've suggested is itself a duplicate, but it's the closest match I found to your question. $\endgroup$ – John Rennie Mar 5 '14 at 7:47