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### What if two twins flew off in opposite directions and were reunited in a perfectly symmetric way, would they have aged same? [duplicate]

If No, well this can't be, as there is perfect symmetry, you can't tell one from the other. If Yes, they had relative velocities all along, then their times must have dilated and somehow they must ...
124 views

### Time dilation and twin paradox - can this be explained in plain English? [duplicate]

If one twin goes with an extremely fast rocket to Alpha Centauri and back, time is going slower for him, so when he comes back, the twin that stayed on the Earth is older. But... if we look from the ...
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### How do you solve the twins Paradox? [duplicate]

I'm a beginner physics student only studying elementary AP-level physics and calculus, so when I came across the conceptual basis of the twins paradox I was, of course curious. People often explain ...
173 views

### Twin's clock slowing down [duplicate]

This question is not same as explaining Twin paradox. This question does expect that the travelling twin will age less. The question in here is what causes the travelling clock to slow down, which is ...
216 views

### Twin paradox - confusions in explanation [duplicate]

I know the following question is sure to cause howls of anguish. I can only apologize for the length at which I have had to write in order to be precise, and I do hope people will bear with me for a ...
153 views

### Doesn't the slowing of time when travelling at almost light speed create a paradox with an observer? [duplicate]

Disclaimer: I am extremely new to this and have no proper knowledge of this subject at all, this is just an idea that I had which I want to properly understand. I don't have any knowledge of necessary ...
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### 3 variations of the Twin Paradox [duplicate]

Here I state and try to answer three variations of the twin paradox 1) "Classical" problem, no acceleration, no turn around Consider the case where there's a stationary planet, and a moving ...
151 views

### How to differentiate permanent age difference in the twin paradox from reciprocal time dilation? [duplicate]

I'm hereby editing my previous question about the cause of permanent age difference in the twin paradox example as a result of the links I've been given as answers to my original question. I am trying ...
117 views

### A question on twin paradox [duplicate]

Let there be two children Allen and George . now Alan boards a train and the train moves at a speed comparable to light. now because George is on the station for George being at rest Allen is moving ...
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### How can time dilation occur for one person but not another? [duplicate]

I have heard of the thought experiment where someone fly off in spaceships and come back younger than their twin on earth. But a fundamental idea behind general relativity was that motion can only be ...
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### How can we define event to be proper and improper when there is no absolute frame of reference [duplicate]

Suppose in an empty space two rocketships exists with person A and B of same age inside each. Let A move with velocity c/2 away from B and return. They'll find out that B grew older while A didn't ...
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### Reconciling Two Contradictory results of Time Dilation [duplicate]

Two massless objects exist in a flat spacetime, objects A & B. A has a velocity of 0.866c, moving directly away from B, from the frame of reference of B. B will perceive A's time to be passing at ...
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### The Special Relativity springs from the space-time nature? [duplicate]

Suppose we have 2 clocks in the same reference system which are synchronized. These two clocks exchange signals every second. Now suppose that one of the two starts to move away (instantly with \$||v||=...
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### Trouble understanding time dilation [duplicate]

I am new to relativity, so I am sorry if this question is stupid. I've been having some trouble understanding time dilation. My problem comprises of a spaceship moving at a very high speed relative to ...
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### Thought experiment - travelling one hour at the speed of light [duplicate]

I'm new to physics and I've been debating a thought experiment with my friends. I think something similar has been answered on this site but to be honest I don't understand the responses - if anyone ...

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