Re: Langevin's paradox again

Le 12/07/2024 à 15:24, "Paul.B.Andersen" a écrit :

Den 11.07.2024 20:29, skrev Richard Hachel:

We admit that the rocket can withstand these terrible accelerations,
and Terrence observes that the U-turn takes place in 40 hours.
 For Stella, the clean time is shorter, only 24 hours.

 Got it.
Stella ages 24 hours while Terrence ages 40 hours during the U-turn.

 Absolutely.
 The effect is absolute in this case.
 But beware! Both protagonists, however, have an internal chronotropy of their watch which each beats faster than the internal chronotropy of the other watch.
This effect is reciprocal.
But we must not confuse internal chronotropy and external time measurement (which is a result, and what is INSCRIBED on watches).
I have been asking for this difference to be understood for decades.
 Vo=0.8c
 T1=40 hours  T2=24 hours
  R.H.