 #1
WWCY
 479
 12
Homework Statement
You are standing at x = 9.0 km and your assistant is standing at x = 3.0 km. Lightning bolt 1 strikes at x = 0 and lighting Bolt #2 strikes at x = 12.0 km. You see the flash from Bolt #2 at t = 10 μs and the flash from Bolt #1 at t = 50 μs. According to your assistant, were the lightning strikes simultaneous? If not, which occurred first, and what was the time difference between the two?
Homework Equations

The Attempt at a Solution
Drawing a ct/t graph it is clear that the observer sees both flashes simultaneously (while the bolts strike at different times in my frame of reference). The solution manual states however, that the observer will say that the bolts do not strike at the same time as he/she is standing in 'my' frame of reference. My questions are:
1. In the case of the assistant does seeing the flashes =/= measuring the strike? How would one be able to see a simultaneous flash but measure a nonsimultaneous strike?
2. Why does the assistant share the same frame of reference with 'me'? Is it because of the equation x = x' +vt where v (assistant w.r.t 'me') = 0 and therefore x = x'? (Where x is 'my' frame and x' is the assistant's frame)