3 ms·
The symmetry is broken in your twin example because the travelling twin had to accelerate to depart, accelerate to turn around, and accelerate to stop again at
by jeffwass 5y ago
The symmetry is broken in your twin example because the travelling twin had to accelerate to depart, accelerate to turn around, and accelerate to stop again at earth.
- platz 5y agoIt has nothing to do with acceleration. You can play games with acceleration and start to get "wrong" answers with the twin paradox. What actually matters is who travels the longest World Line a.k.a. the longest path in 4-d spacetime https://en.wikipedia.org/wiki/World_line https://en.wikipedia.org/wiki/World_line . That is all. A person on a non-curved geodesic spacetime path ages more quickly than a person on a curved non-geodesic spacetime path