# The Naked Scientists Forum

### Author Topic: What is the main difference between Special and General Relativity?  (Read 572 times)

#### jeffreyH

• Global Moderator
• Neilep Level Member
• Posts: 3929
• Thanked: 55 times
• The graviton sucks
##### What is the main difference between Special and General Relativity?
« on: 15/10/2016 10:34:30 »
Personally I believe it is negative kinetic energy which is absent in SR. What do you think?
« Last Edit: 15/10/2016 11:05:36 by chris »

#### Colin2B

• Global Moderator
• Neilep Level Member
• Posts: 1921
• Thanked: 125 times
##### Re: What is the main difference between Special and General Relativity?
« Reply #1 on: 16/10/2016 12:53:08 »
What about the treatment of acceleration?

#### jeffreyH

• Global Moderator
• Neilep Level Member
• Posts: 3929
• Thanked: 55 times
• The graviton sucks
##### Re: What is the main difference between Special and General Relativity?
« Reply #2 on: 16/10/2016 13:40:56 »
Since the direction of the force is towards the centre of mass then both acceleration and the induced kinetic energy are negative. They go hand in hand. At the moment I am examining both the shell theorem and the Yukawa potential and may have more thoughts.

#### Colin2B

• Global Moderator
• Neilep Level Member
• Posts: 1921
• Thanked: 125 times
##### Re: What is the main difference between Special and General Relativity?
« Reply #3 on: 16/10/2016 16:28:34 »
... At the moment I am examining both the shell theorem and the Yukawa potential and may have more thoughts.
Look forward with interest.

#### jeffreyH

• Global Moderator
• Neilep Level Member
• Posts: 3929
• Thanked: 55 times
• The graviton sucks
##### Re: What is the main difference between Special and General Relativity?
« Reply #4 on: 16/10/2016 21:13:35 »
In the meantime, as a slight aside, this looks interesting.

https://en.m.wikipedia.org/wiki/Fifth_force#possible_evidence

The link doesn't appear to move to the possible evidence section so you may have to scroll down. The whole article is worth a read.
« Last Edit: 16/10/2016 21:18:16 by jeffreyH »

#### jeffreyH

• Global Moderator
• Neilep Level Member
• Posts: 3929
• Thanked: 55 times
• The graviton sucks
##### Re: What is the main difference between Special and General Relativity?
« Reply #5 on: 22/10/2016 03:37:57 »
If instead of treating Planck's constant h as a constant we define u = E0t where E0 is the emission energy. We can determine an energy equation of the form E = uf0 where f 0 is the emission frequency. The equivalent mass term is then m = E/c^2.

The Yukawa potential is V(r) = -g^2[e-kmr/r]. For the electromagnetic field g = 1 and since m = 0 we have a potential of 1/r. If we use our new mass term then the energy based on action varies with radial distance. This describes what sounds like the gravitational field. Except that the value of the constant k has not been determined.

#### jeffreyH

• Global Moderator
• Neilep Level Member
• Posts: 3929
• Thanked: 55 times
• The graviton sucks
##### Re: What is the main difference between Special and General Relativity?
« Reply #6 on: 22/10/2016 04:20:09 »
Please note. I have severe doubts about the validity of the formulas in the previous post. I need to think through the implications.

#### jeffreyH

• Global Moderator
• Neilep Level Member
• Posts: 3929
• Thanked: 55 times
• The graviton sucks
##### Re: What is the main difference between Special and General Relativity?
« Reply #7 on: 22/10/2016 04:53:36 »
The Yukawa potential has to do with exchange particles so the above formula no longer expresses this. It may be that this represents the potential for action at points in the field.
« Last Edit: 22/10/2016 04:55:58 by jeffreyH »

#### jeffreyH

• Global Moderator
• Neilep Level Member
• Posts: 3929
• Thanked: 55 times
• The graviton sucks
##### Re: What is the main difference between Special and General Relativity?
« Reply #8 on: 22/10/2016 05:02:57 »
On a related note.

https://en.m.wikipedia.org/wiki/Einstein%E2%80%93Hilbert_action

Feel free to kick me into new theories at any time.

#### jeffreyH

• Global Moderator
• Neilep Level Member
• Posts: 3929
• Thanked: 55 times
• The graviton sucks
##### Re: What is the main difference between Special and General Relativity?
« Reply #9 on: 31/10/2016 00:32:12 »
Consider a situation where we have two positions within a gravitational field labeled A and B. Define them to be at different gravitational potentials. Then if a photon with frequency f0 is emitted at A and travels to B its frequency there is f1. If a photon is emitted at position B with frequency f1 then to balance the books the final frequency upon arrival at position A should be f0. So that emission energy is a variable and potential is a function of the emission energy and the position in the field. Mapping action potentials to the field then makes sense.

#### phyti

• Jr. Member
• Posts: 37
##### Re: What is the main difference between Special and General Relativity?
« Reply #10 on: 31/10/2016 17:59:39 »
I thought it was formulation in a gravitational environment.

#### The Naked Scientists Forum

##### Re: What is the main difference between Special and General Relativity?
« Reply #10 on: 31/10/2016 17:59:39 »