Recent content by Timbo65

Thanks for your replies. I sat down and tried to formulate an example that better articulates my question. As a result, I untangled my mind and realised I was overthinking it - I now get it. Thanks again.

Einstein's thought experiment involves a train carriage, a platform and two observers. The train carriage moves relative to the platform, and one observer is in the middle of the carriage, passing the other observer standing on the platform. When the two observers pass each other, lightning...