- 21

- 0

- Summary
- how can a train traveling at light speed, travel at two different speeds being the same train, depending upon whether you are on the train platform or in the train

**Summary:**how can a train traveling at light speed, travel at two different speeds being the same train, depending upon whether you are on the train platform or in the train

You say good bye to your friend at the train station. You get into train that will travel at just under light speed (ignore the physical issues of impossible g forces for such acceleration and deceleration), There is a physical "counter", perhaps a physical bar that sticks out and the train srikes it with each revolution., Each time the train completes a revolution and strikes the bar as it passes, the counter increases by 1. There is such a counter on both the train and at the train station platform. To you, on the train, you have been on the train for 10 minutes but to your friend at the platform who you said goodbye to before getting onto the train, 10 years have passed. So how many revolutions did the train make around the planet? IT is the same train, but the counter ON the train would show 10 minutes worth of revolutions at 7 revolutions per second and the counter at the platform would show 10 years worth of revolutions at 7 revolutions per second. How can the same train show two different counters when it had to physically hit the counter physical "bar" that with each contact revolution it increase the counter by 1? How many times did it hit that counter bar? how can it be two different answers? when you get off the train, you are 10 minutes older but your friend is 10 years older.