In the twin paradox, the earthbound twin observes the travelling twin to be agin
ID: 2039488 • Letter: I
Question
In the twin paradox, the earthbound twin observes the travelling twin to be aging slowly. Consequently, when his brother returns, he is older than his traveling brother. Why can't we say the reverse: the travelling twin sees the earthbound twin to be aging slower?
they both love physics
The travelling twin is not in an inertial frame because he has to accelerate.
None of these
the traveling twin is measureing proper time.
a.they both love physics
b.The travelling twin is not in an inertial frame because he has to accelerate.
c.None of these
d.the traveling twin is measureing proper time.
Explanation / Answer
Option (b) is correct because we can’t treat the earthbound twin's frame of reference as inertial. There is a force (the rocket jet) affecting travelling twin's frame of reference and no force on the earthbound twin's frame of reference. I stand to be corrected but I think that at constant velocities you can apply either frame of reference, but not when one body experiences any kind of acceleration.