General relativity question

  • Thread starter mogsy182
  • Start date
  • #1
17
0

Main Question or Discussion Point

So is it the closer you are to the centre of a body the slower time will go? or is it the other way round. also why is this?

my lecturer confused me a bit when explain it, but whats general rel got to do with the orbit of a satellite?
 

Answers and Replies

  • #2
Mentz114
Gold Member
5,428
290
my lecturer confused me a bit when explain it, but whats general rel got to do with the orbit of a satellite?
This is a strange question. GR is a theory of gravity, so it is relevant to orbits.
 
  • #3
126
0
The closer one is to a body of energy (and energy's other forms: heat conduction, pressure, and viscosity), the slower one's rate of time is. It is the gradient of this gravitational time dilation (how much the rate of time slows based on a change in distance) that causes acceleration to occur.

From a Newtonian point of view (in a weak gravitational field, and where relativistic precession is all but none), the orbiting body maintains a constant rate of time, and so follows a circular path of constant distance from the gravitating body. I believe that this is also referred to as a "straight path in spacetime" results in a "curved path in space".

As for the actual mechanism behind gravitational time dilation, that's to do with quantum gravity (superstring theory, loop quantum gravity). I cannot go into detail on either, for lack of knowledge.
 
Last edited:

Related Threads for: General relativity question

  • Last Post
Replies
6
Views
2K
  • Last Post
2
Replies
26
Views
3K
  • Last Post
Replies
1
Views
963
  • Last Post
Replies
2
Views
1K
Replies
6
Views
1K
  • Last Post
2
Replies
30
Views
2K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
1
Views
2K
Top