Hi.(adsbygoogle = window.adsbygoogle || []).push({});

I am learning special relativity and have decided to take Einstein's train example to practice some calculations. I have given the train speed v=1/4c and have decided on distances that make the side observer's space and time calculations straightforward.

I have calculated everything using the invariance of the spacetime interval equation. (ST^2 = T^2 - S^2) for timelike intervals and (ST^2 = S^2 - T^2) for spacelike intervals; where S is the spatial distance, T the temporal distance and ST the spacetime interval between events.

However, whenever I try to think about how I would approach the matter of the train rider's interpretation of the time and space coordinates of the side observer's seeing both lightning flashes, I draw a blank.

Can you think of the easiest way to approach this using just the spacetime interval equation?

edit: Also please note this isn't a homework question - I wanted to do this for myself. This is why I placed this thread here rather than on the homework forum.

Thanks!

**Physics Forums - The Fusion of Science and Community**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Einstein's train - When+where does side observer see lightnings to the train rider?

Loading...

Similar Threads - Einstein's train When+where | Date |
---|---|

I Einstein's Train Example Seems to Exceed c...? | Jun 27, 2016 |

B Turning Einstein’s train thought experiment on its head | Mar 24, 2016 |

B Einstein Train experiment with a consequence? | Mar 11, 2016 |

What determines when events are simultaneous? | Feb 4, 2016 |

I Gravity on Einstein's train | Oct 4, 2015 |

**Physics Forums - The Fusion of Science and Community**