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- Thread starter mim
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bapowell

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No, it's just that gravity has more ground to cover. If you imagine that all the forces should be of roughly equal strength, but that electromagnetism and the nuclear forces only operate in our 3 spatial dimensions while gravity must contend with 9 dimensions, you can easily see how it gets "spread out" and diluted.

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Many thanks bapowell I get it.No, it's just that gravity has more ground to cover. If you imagine that all the forces should be of roughly equal strength, but that electromagnetism and the nuclear forces only operate in our 3 spatial dimensions while gravity must contend with 9 dimensions, you can easily see how it gets "spread out" and diluted.

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I don't understand your answer vin300. I thought a graviton was a closed string that was shaped or vibrated in a particular way that made it unique ie a graviton also my understanding of the theory was that only gravitons could pass through a brane. We could therefore still do with lasers

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No, it's just that gravity has more ground to cover. If you imagine that all the forces should be of roughly equal strength, but that electromagnetism and the nuclear forces only operate in our 3 spatial dimensions while gravity must contend with 9 dimensions, you can easily see how it gets "spread out" and diluted.

A clarification question: This "diluting" only happens in theories where our universe is actually just a 3 spatial brane in a higher dimensional world, as opposed to a 9 spatial dimension universe with 6 curled up, Correct?

If not, I'm having trouble seeing how light and other interactions can avoid the curled dimensions.

If yes, then it seems like if our 3 spatial brane is curved in the higher dimensions, that the gravitons leaking out could hit back on the brane elsewhere ... therefore causing what appears to be "more gravity from nothing". Or is there something which prevents gravitons from "leaking in", and they can only "leak out"?

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