Quote:
Originally Posted by 2MuchMark
No sorry, Time is not constant. Time is relative. Time for an object or person flows faster or slower than another person or object depending on how fast its going, or how much gravity is influencing it. This isn't just a theory, it has been proven again and again. The flow of time is different for satellites flying around the earth, and its very different for atoms flying through the LHC. Time is relative.
No buddy, sorry. Gravity is a force. There's a good primer on Gravity here: https://cosmosmagazine.com/physics/e...hat-is-gravity |
gee, you are you confused by everything I said.
I made no conjecture to the definition of gravity.. read it again.
Time is the same for you no matter where you are.
ONLY Your 'perception' of time is relative to where you are. Your perception and reality do not always match.
So, those satellites you describe in orbit, run at the same time no matter where they are. Orbiting Earth, the Sun or Vega.
I believe your reference is...
If you wish (by example) to synchronize commands to act at once, you would have to calculate where they are, and the direction of movement (from where you are) so they would get the command at the same time. For the radio signal travels slightly lower than the speed of light (generally calculated at 300,000,000meters ps).
The Doppler effect applies so the transmitting radio signal has to be adjusted higher or lower depending on if the satellite is move towards us or away from us. And if we are receiving or transmitting.. It is all relative to where you are and where they are and the direction and speed they move at referenced from where we are.
But this still is a mechanical reference measurement that is effective to do the job. And only because you know the speed of a radio wave and the distance and direction and speed of the target. I use this frequently when I transmit to satellites. Or receive slow scan TV from the ISS.
But it does not actually measure time itself. All of the calculations are relevant to each other. Time is the same everywhere. If it was not, we would have a problem doing this.
But because time 'is' the same everywhere, we have to adjust the transmitting time and frequency of our radio signal signal to match the distance and movement of those satellites. Something we do not have to do with geostationary satellites and they are moving at the same rate as the rotation of the earth .
I receive weather imagery everyday from them and while it is seconds to travel to my receiver, I do not have to adjust the frequency of the radio signal. There is a relevance of it and me traveling at the same speed and direction. But I must adjust for the polar orbiting weather sat's. Lower frequency as they as they move away from me and higher as they move towards me.
Well documented Doppler effect.
A great example is as simple as looking into the night sky at the stars. Most of which to not exist right now. You are seeing them as they were, perhaps at a time even before earth existed. LOL, Apparently, the speed of light is much slower than time itself or you would be seeing them as they are, not as they were.
You might one day travel faster than the speed of light but you will never travel faster than time.
But it is the same time there as it is here. And those stars not likely to look like that now.
The Only thing that is different is your perception of it.
Einsteins explanation of time travel was only from your perception. Nowhere was he actually stating that you could physically travel through time, although, admittedly, it kinda sounds that way on the surface after the translation. It's all a matter of perception in description of relevance. Many of seemingly smart folks still can't get a grasp on that.
Think of light with the Doppler effect imposed on it. That was his description.
Gravity is a force derived from and relevant to mass. Nothing directly relevant to time.
But you could use the two to calculate other things. But you are still going to use some mechanical reference to describe time .
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Here is a thought question for you all. It may help you think about this better.
If a explosion happened somewhere in the universe that could hurl/move projectiles faster than the speed of light and they were all headed for earth,
when would you know it here on earth ?
Did it happen before your ability to know it happened ?
was there any time travel involved ?
To see it for what it is, you must look at it from at least 3 perspectives. Each is a perception. None are the same.
I used that question, phrased slightly different, to quite my 8th grade science teacher. But he was not impressed. But a great guy because he would provoke this kind of thought.
Do not confuse the effects or measurement of speed , distance or mass with time.
You can make time whatever mechanical reference you apply to it 'for calculations' but you have not actually measured it.