Moving Around in Outer Space
Most recent answer: 01/02/2015
- Shanthika (age 17)
You have an interesting premise. Not all is lost if you remembered to bring along a few batteries and your handy laser gun. All you have to do is to fire off a couple of rounds. The photons from the laser gun start off at the speed of light with respect to you. They carry off bits of momentum and you will drift off in the opposite direction with equal and opposite momentum, in agreement with the conservation law. By pointing the laser gun in a direction opposite to that of the earth you could make it back home. The energy required would be that stored in the batteries. Re-entry might be a bit of a problem.
You may want to also look at some old answers on light acceleration:
(published on 01/02/2015)