So you can use that idea to justify that lightning strikes simultaneously for the ground observer and that it doesn't strike simultaneously for the train observer. can't you use that to justify that for two given observers within their own inertial frame of reference traveling at different...
I have seemed to confuse myself after watching this video:
Everything makes sense except for the bit where the video says the passenger sees the bolts at different times. How can this be justified and how do we know the passenger doesn't see them at the same time from his frame of reference?