- #1
Satyam
- 33
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- TL;DR Summary
- Why someone age faster and the other one doesn't if the fundamental unit of time is constant and it is one second. For example at one moving vessel the time experinced is less as compared to someone which is outside of that framework. For this to happen the unit of time experinced by the observer which is on the moving frame has to be stretched as compared to the one which is not moving.
And How is that possible...?
It is a long message indeed but there is one doubt I want to ask, As from the above video the time measured by the person which is outside the Frame of reference let's say t' depends on the position and time measured by the person within the Frame of reference. But how do we know that whose measurement is correct as everything I'm this universe is moving with respect to one another.
Let's consider a hypothesis in which one person went to a planet and when he comes back he is younger than his colleagues i.e who were of same age when he left earth. For this scenario to happen the time has to pass slowly on the planet and rocket as compared to earth. That means the fundamental unit of time which is one second stretches on the other planet than in the Earth but how can this happen because one second can also be defined as the duration in which light travels 2.99 x 10^8 m.
As from the second postulate of Einstein special theory of relativity the speed of light is always constant.
That means one second is always constant so this rules out the possibility of one being younger than other.
I'm only asking if someone can explain this to me they are welcomed.![Grinning face :grinning: 😀](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f600.png)
Let's consider a hypothesis in which one person went to a planet and when he comes back he is younger than his colleagues i.e who were of same age when he left earth. For this scenario to happen the time has to pass slowly on the planet and rocket as compared to earth. That means the fundamental unit of time which is one second stretches on the other planet than in the Earth but how can this happen because one second can also be defined as the duration in which light travels 2.99 x 10^8 m.
As from the second postulate of Einstein special theory of relativity the speed of light is always constant.
That means one second is always constant so this rules out the possibility of one being younger than other.
I'm only asking if someone can explain this to me they are welcomed.
![Grinning face :grinning: 😀](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f600.png)