I never got a real answer to this thought experiment. It's something I always thought about but I've been too lazy and dumb to figure out. So say two people are hanging out in space and their watches are synced to 12:00, then one person blasts off, turns around then comes back.
`Clocks slow down when they move in relation to you`
So to the "stationary" person, the clock of the person who zoomed off would be behind. But since it's relative, to the "zoomer" the stationary person went out and back. So then to the zoomer the stationary person's watch would be slower.
But which one is it? Do they end up showing the same time?
`Clocks slow down when they move in relation to you`
So to the "stationary" person, the clock of the person who zoomed off would be behind. But since it's relative, to the "zoomer" the stationary person went out and back. So then to the zoomer the stationary person's watch would be slower.
But which one is it? Do they end up showing the same time?