# Non-Inertial FRs in GR: Summary & Sources

• GarageDweller
In summary, the conversation discusses the treatment of non-inertial frames in General Relativity (GR) and provides resources for further understanding. Non-inertial frames in GR have the same formulation as in Special Relativity (SR). The recommended resources for understanding non-inertial frames in SR are chapter 3 of the provided notes and the text available through Springer. For GR, the Wikipedia page on frame fields in GR is suggested. The speaker also asks for clarification on what specifically is confusing about non-inertial frames in GR.
GarageDweller
Bit confused regarding how non-inertial frames can be treated in GR (and by non-inertial i mean affected by some kind of four-force). Can anyone give a brief summary or link to some good sources?

They have the exact same formulation as in SR. So for starters have you seen how non-inertial frames are treated in SR?

If not then read chapter 3 of the following notes: http://www.uio.no/studier/emner/matnat/fys/FYS4160/v06/undervisningsmateriale/kompendium.pdf

If you have springer access through your university then there is no better reference you could possibly hope for than the following text: http://link.springer.com/book/10.1007/978-3-642-37276-6

For GR see: http://en.wikipedia.org/wiki/Frame_fields_in_general_relativity

Could you at least specify what exactly is confusing you about non-inertial frames in GR?

## 1. What are non-inertial frames of reference in the context of general relativity?

Non-inertial frames of reference are frames of reference that are accelerating or rotating. In general relativity, these frames are important for understanding how gravity affects the behavior of objects.

## 2. How do non-inertial frames differ from inertial frames in general relativity?

Inertial frames are frames of reference that are not accelerating or rotating, and they follow the laws of special relativity. In contrast, non-inertial frames experience the effects of gravity and require the use of general relativity to accurately describe the behavior of objects within them.

## 3. What are some sources of non-inertial frames in general relativity?

Some common sources of non-inertial frames in general relativity include rotating objects, such as planets and stars, as well as accelerating objects, such as rockets and airplanes.

## 4. How does general relativity account for the effects of non-inertial frames?

In general relativity, the effects of non-inertial frames are accounted for through the curvature of spacetime. This curvature is caused by the presence of massive objects and results in the acceleration of objects within the frame, as described by Einstein's field equations.

## 5. What are some practical applications of understanding non-inertial frames in general relativity?

Understanding non-inertial frames in general relativity is crucial for accurately predicting and describing the behavior of objects in our universe. This knowledge has practical applications in fields such as astrophysics, navigation systems, and space travel.

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