Solution for the Twin Paradox?

>>8979067
Too tired to recall exactly how it works but it lies in the acceleration of turning the rocket around

>>8979067
what is general relativity for 500 Alex?

the twin on earth isn't subject to acceleration experienced by the leaving twin.

>>8979072
>>8979073
Acceleration is mentioned in the common explanation for this, but it is based on the idea that acceleration can always determine what is inertial frame and what is not an inertial frame. This idea is wrong however i.e. free fall. If everything on either of the moving bodies is being accelerated, acceleration is no different than speed to determine a inertial frame.

>>8979072
>>8979073
What if you have two rockets travelling away from each other, then both turning around and returning to meet back where they started? So it's perfectly symmetrical.

So if we strapped some big rockets to accelerate earth, would everything on the planet live longer (yet be unaware of) ?

they see each other as moving but that's not the point.

the point is the ultimate referee of time is light. it's because of the closer speed towards light in the rocket that aging is slower.

the thought experiment is in the rocket ship that approaches the speed of light you install a clock that tells time by a bouncing photon. as you near the speed of light the photon is doing less bouncing (to the observer on earth) and time is thus slower on the rocket. when you hit the speed of light the photon must simply move with the rocket and does not bounce therefor time has stopped.

>>8979317
Well, you fucking idiot kek, the photon will also be bouncing less on Earth from the observer on the ship. That is the paradox

File: twin paradox.png (414KB, 850x613px) Image search: [Google]

414KB, 850x613px

https://youtu.be/0iJZ_QGMLD0

>>8979067
the twin paradox has nothing to do with acceleration of the rocket ship.

the twin paradox arises by implying that the signals sent from earth to the ship and from the ship to earth are symmetric, which they aren't.

the twin paradox is resolved by looking at the relativistic doppler shift. there is nothing more to it than the fact that the person on earth gets less signals about the twin's age as it travels away from the earth, and more as it comes back. but it can't get signals from the return trip until the last signals on the outbound trip make it to the earth first. so after everything is said and done, both twins can conclude the twin that returns to the original frame of reference does in fact age less.

>>8979087
Free fall is an inertial frame tho

>>8979304
No.
Well, technically yes, but there would be nobody outside of the frame of reference to notice it. I suppose you would be able to tell because of the stars changing at an apparently increased rate.

>>8979399
That involves the Doppler effect, can we please keep it under special relativity, never mind this bullshit if the simpler stuff is wrong

>>8979067
Easy, obviously space is not relative, coordinates are static and absolute.

>>8979573
Then we can't say anything is wrong about acceleration itself, but simply the perception of... non-uniform acceleration, you see this going out the thought rail?

>>8979317
That doesn't explain why one twin would age slower, idiot. Nor does it explain why a mechanical clock would move more slowly (this has been observed btw)

File: 1488106905358.gif (69KB, 840x514px) Image search: [Google]

69KB, 840x514px

>>8979126
>What if you have two rockets travelling away from each other, then both turning around and returning to meet back where they started? So it's perfectly symmetrical.
If the acceleration is symmetrical, the time dilation is symmetrical.
If the time dilation is symmetrical, both twins come out the same age.

Its not that hard, but it gets a bit mixed up when you guys confuse how the two sees each other and how they actually move through spacetime.

The simple explanation is that one of the twins accelerates into a slower path through time.

Its not the acceleration itself that is causing it, or does it have anything to do with the light coming of them.