Quote (balrog66 @ Feb 3 2012 11:02am)
Jeebus you are terrifically dense.
Have you even read anything that has been said? Are you capable of reading comprehension? When we send sattelites into orbit, we have to account for time dilation. That means that we have to make the clocks that run inside the sattelites run faster than the ones that we use. Because when these sattelites are in orbit, they move at such a speed that time slows down enough to make very noticeable differences. We wouldn't have GPS if we did not account for time dilation.
This is a very good source explaining how time dilation in relativity works:
http://galileo.phys.virginia.edu/classes/252/srelwhat.html.
Do you EVEN understand why we need to do that on satellites? Or even better why you can't travel back in time? Or even better why time doesn't slow down no matter the speed you travel if you come to a stop in the end and meet your friend in the same momentum that he is??
I'll tell you, the sattelites to begin with are far from us, so information and even light takes time to get to you which us the observer.
The sattelites are not in the same momentum as you, they are moving faster AND not in the same place as you.
Now here's what happens with their speed and clocks:
Assuming you are stopped and the satellites moving faster, it takes awhile for the information they send to get to you, so when you receive the signal that at 12:00pm (on your clock) the satellite is in a certain position, in reality he's not there anymore, he already moved a little bit further.
That's why the "clocks" speed on the satellites are ADJUSTED in every second depending on their position towards the receiver on earth.
It is not a constant acceleration or lets say a constant clocking speed, their clocks speed is regulated depending if they are moving away from you or catching you from behind, etc..
Did you understand now?
There is no such a thing as time dilation between two objects that are in the same momentum, traveling at light speed or not.
There is a time dilation in between an observer and a moveable object, when this object travels away from you at light speed, he will remain forever the same age while you get old, and you will remain the same young for him while he gets old. Yes he gets old too.
Just because he's traveling at light speed, the image you get from him will always be the same WHILE he moves away from you.
When he comes back to you and stops on your side you will realize that he's the same age as you actually.
Speed DOESNT affect clocks, only for different observers in different momentums.
Edit: Funny thing is you link me a website that actually explains it very well, however you preach otherwise lol
bold: this part I will just ignore and say anyone can create any theory on his own about anything.
Regardless of being a scientist it not, a theory is just like an opinion based on our understanding.
So yea Carl sagan was wrong in that video, very wrong, also Einstein in most of his theories. But he was a nice guy.
This post was edited by omghacks2 on Feb 3 2012 03:50pm