You are standing at x=9.00 km and your assistant is standing at x = 3.00km. Lightning bolt 1 strikes at x = 0km and lightning bolt 2 strikes at x = 12.0 km. You see the flash from bolt 2 at t = 10e-6s and the flash from bolt 1 at t = 50e-6s. According to your assistant, were the lightning strikes simultaneous? If not, which occurred first and what was the time difference between the two?
