This question assumes a number of (let's say
10) small, light-sail spacecraft connected in series which have been propelled from earth by a laser and are currently approaching the speed of light.
Each craft itself has a laser which is used to propel the craft in front of it.
Considering the speed of the craft, despite their small size, their momentum would be sufficient that the reactive force of the photons when they fire their lasers would not impact their velocity considerably (correct me if I'm wrong there).
Suppose the craft, starting with the rearmost, turned their lasers on in series to propel the one in front of it:
- Could the leading craft be accelerated to faster than the speed of light?
- Are there any hypothetical scenarios in which this would be "technically" possible (the speed of light is preserved, but the object could still reach an arbitrary destination faster than light could from the same starting point)?