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## Main Question or Discussion Point

here I will ask on linear motion

if in linear motion both can claim that the other is moving and

because the one that is moving it clock will go slower so

both claim that the other ones clock is going slower so when they will

meet (for instance the motion is toward each other) who will actually be younger.

even more

consider

A <-------------------> B ------------------> c

when A and B are any objects moving apart with linear motion of any

speed and c is the light going to the right of both.

because both are linear so both claim that they are at rest and the

other one move and his clock is getting slower.

so let see how it's work A claims that he is at rest and the clock of

B gets slower so he still sees light constant, that's fine.

but B claims that he is at rest so A will move so according to B then

Ac (the speed of c according to A) will be more then the speed of

light and the movement of A (from B's point of view) makes the situation worse because its time

slows down so it is getting even much more then the speed of light.

and because that cant be so its clear that A is at rest and B is

moving.

so there is a way to say who is moving even with linear motion

if in linear motion both can claim that the other is moving and

because the one that is moving it clock will go slower so

both claim that the other ones clock is going slower so when they will

meet (for instance the motion is toward each other) who will actually be younger.

even more

consider

A <-------------------> B ------------------> c

when A and B are any objects moving apart with linear motion of any

speed and c is the light going to the right of both.

because both are linear so both claim that they are at rest and the

other one move and his clock is getting slower.

so let see how it's work A claims that he is at rest and the clock of

B gets slower so he still sees light constant, that's fine.

but B claims that he is at rest so A will move so according to B then

Ac (the speed of c according to A) will be more then the speed of

light and the movement of A (from B's point of view) makes the situation worse because its time

slows down so it is getting even much more then the speed of light.

and because that cant be so its clear that A is at rest and B is

moving.

so there is a way to say who is moving even with linear motion