A space cowboy wants to eject from his spacecraft 1.60×105{\rm km} after passing a space buoy, as seen by spectators at rest with respect to the buoy. To do this, the cowboy sets a timer on his craft that will start as he passes the buoy. He plans to cruise by the buoy at 0.471 c .
How much time should he allow between passing the buoy and ejecting?
a) 1 sec
b) 1.2 sec
c) .8 sec
d) 1.1 sec
e) 1.05 sec