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What if there is another twin travel to the opposite direction with the same speed? And another one in perpendicular direction?
Quote from: hamdani yusuf on 07/03/2024 03:31:47What if there is another twin travel to the opposite direction with the same speed? And another one in perpendicular direction?Direction is irrelevant to time dilatation. What matters is relative velocity, i.e. the vector that describes their rate of separation.
In the example in the video, the gamma factor is 2, which means the speed is around 0.866c.In case of another twin travels with the same speed but opposite direction, the relative speed between them will be around 0.9897c, according to relativistic velocity addition. The gamma factor is around 7.
How do you read a clock or a ruler without your eyes?
Quote from: alancalverd on 07/03/2024 08:44:55Quote from: hamdani yusuf on 07/03/2024 03:31:47What if there is another twin travel to the opposite direction with the same speed? And another one in perpendicular direction?Direction is irrelevant to time dilatation. What matters is relative velocity, i.e. the vector that describes their rate of separation.What do you think about my calculation below?Quote from: hamdani yusuf on 06/03/2024 10:33:48In the example in the video, the gamma factor is 2, which means the speed is around 0.866c.In case of another twin travels with the same speed but opposite direction, the relative speed between them will be around 0.9897c, according to relativistic velocity addition. The gamma factor is around 7.
During short period of turn around, earth clock jump from 5 to 35 years. While the other travelling twin's clock jump from 10/7 to 130/7 years.
change of velocity.
Quote from: hamdani yusuf on 08/03/2024 21:46:36 change of velocity.Oh dear. That's called "acceleration", which some of our correspondents say is irrelevant.
They meet at turn around point.
Quote from: hamdani yusuf on 09/03/2024 02:22:17They meet at turn around point. ...and cannot synchronise their clocks because vrel >0.
Quote from: hamdani yusuf on 08/03/2024 21:17:02During short period of turn around, earth clock jump from 5 to 35 years. While the other travelling twin's clock jump from 10/7 to 130/7 years.Earth clock jumps by 30 years, while the other travelling clock jumps by 120/7 years. How are those numbers calculated? They should depend on the distance and change of velocity. When the distance is zero, there's no time jump, just like at the start of the journey. The other travelling clock is further than the earth clock during the turn around. But somehow it undergoes less time jump. Where did I miss?
Why not?
Quote from: hamdani yusuf on 10/03/2024 09:14:36Why not?Time dilatation. If identical clocks are moving relative to one another, you can't tell the time shown at B simply by looking at clock A.
(Personally, I think the OP is diving off into Twins' Paradox etc, with ever increasing complexity, when they don't really grasp the significance of the basics of relativity. I think the explanations need to get simpler, not more complex.)
Do you think that symmetry always break down?
I live in a country that has two languages.
given their ancestors were ocean explorers.
Quote from: hamdani yusuf on 10/03/2024 21:05:22Do you think that symmetry always break down? It does, by theory and experiment. Nothing to do with what I think.