My thoughts or two bobs worth.
To any
observer travelling at any speed, the speed of light would have to be absolute and relative to the observer.( I don't know of anyone who has seen anything travelling faster than the speed of light!)
If two spaceships
could travel at the speed of light(improbable) in one direction they would therefore be able to see each other with light travelling between them at the same speed of light relative to each other. I think then in this case that ship A would see the beam of light from ship B at the speed of light between them.(Question 1 & 2)
Theoretically Question 3 would have to assume that the bullet (mass) can travel faster than the speed of light. If it could then the bullet would hit
ship A at 4500ft/sec.
Personally I don't think any matter can travel faster than the speed of light.
If that were the case then we are in deep s--t from any object in space on a collision course with Earth travelling faster than the speed of light. We definitely wouldn't have time to kiss our backsides goodbye.
