another : x=0 the other : x=600m they all travel towards each other on the x axis 2 photons meet @ point x @time t measu

[answerhappygod]

another : x=0
the other : x=600m
they all travel towards each other on the x axis
2 photons meet @ point x @time t measured in frame K
frame K' is moving @ 0.95c in + x direction
K&K'origins coincide & t=t' =0
clocks of 2 frames are 0'ed when origins coincide
where does the space and time coordinates (x' , t' ) of the 2 photons meet