This question already has an answer here:
Third law of motion - "For every action there is an equal and opposite reaction"
I was considering the situation, where I may be motionless in space with only a flashlight and no forces acting on me. I could throw the flashlight, and begin my very slow drift in whatever direction I please, but I was wondering, if I direct the flashlight in a certain direction and turn it on, would that also push me until the batteries ran out, even if it's a tiny amount? What if I were generating directed radio waves or similar?