How did 8pi get into Einstein's field equation?

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How did 8pi get into Einstein's field equation?

2006-11-28 09:57:22 · 2 answers · asked by goring 6 in Science & Mathematics ➔ Physics

2 answers

It is just conventional.

If you look at the Electromagnetic Stress-Energy Tensor you will see that its expression has a 1/4pi in it. This cancels out the one in Einstein's Equation.

You could redefine all the physical properties units to include a Root(4pi) so the equation became: G = T ------ very enigmatic!!!!

2006-11-29 02:17:59 · answer #1 · answered by Rufus Cat 3 · 0⤊ 0⤋

Hi. Because it is a tensor equation. : http://www.answers.com/main/ntquery?s=Einstein's%20field%20equation&gwp=16

2006-11-28 18:04:28 · answer #2 · answered by Cirric 7 · 0⤊ 0⤋