You are inside a spaceship in deep space, far away from any stars. Your engines are off and you believe that your spaceship is stationary. You look out and see Phil and Victor approaching you from opposite directions, both at $0\mathrm{.}9$c$.$ From Phil$$s perspective: $($a$)$ what is Phil$$s own speed, $($b$)$ what is your speed and $($c$)$ what is Victor$$s speed compared to the speed of light?

Answer rating: 100% (QA)

When considering motion at relativistic speeds close to the speed of light we need to apply the prin... View the full answer