- #1

- 65

- 4

## Main Question or Discussion Point

Hi all,

I know the twin paradox has been discussed many times, so I hope you'll bear with me. My version has a slight twist.

Suppose twin's A and B start off in a "rest" frame in dead space, frame F, at

If

According to A:

According to F:

According to B:

Intuitively, A and B should have aged similarly. So how is this paradox resolved?

thanks,

Aaron

I know the twin paradox has been discussed many times, so I hope you'll bear with me. My version has a slight twist.

Suppose twin's A and B start off in a "rest" frame in dead space, frame F, at

*x*= 0. At*t*= 0, A moves in the direction*x*with velocity*c*/2, and B moves in direction -*x*with velocity*c*/2. The numbers are just to remove any ambiguity. At*t*_{1}, both A and B reverse their directions and head back to*x*= 0. From A's point of view, B has taken a journey at a relativistic speed more than*c*/2 and less than*c*. Therefore, A should expect B to be younger than him after the journey. From B's point of view, A has gone on a "relativistic" journey, and expects that A is the younger.If

*tp*_{N}is the time passed for N, thenAccording to A:

*tp*_{A}*> tp*_{F}*> tp*_{B}According to F:

*tp*_{A}*= tp*_{B}*< tp*_{B}According to B:

*tp*_{B}*> tp*_{F}*> tp*_{A}Intuitively, A and B should have aged similarly. So how is this paradox resolved?

thanks,

Aaron

Last edited by a moderator: