Deriving 8πG/c^4 in General Relativity

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SUMMARY

The factor 8πG/c^4 in General Relativity (GR) is essential for maintaining dimensional consistency within Einstein's field equations. This term ensures that GR aligns with Newtonian gravity under specific conditions, particularly in the context of the Friedmann Equation. The inclusion of 8π is crucial for the correct formulation of gravitational interactions in the framework of GR.

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shounakbhatta
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Hello All,

In GR the factor 8piG/c^4. I want to understand how the term is derived? I mean to say that is this related to Friedmann Equation. How the factor actually comes into Einstein's field equation?

I am sorry if I am unable frame the question properly.

Thanks.

-- Shounak
 
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The G/c^4 term is there for dimensional consistency. The 8 pi is required so that GR reduces to Newtonian gravity in the appropriate limit.
 

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