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Online Rama Set

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Gravity’s smallest scale
« on: April 07, 2020, 05:06:08 PM »
https://arstechnica.com/science/2020/04/gravitys-inverse-square-law-tested-at-scale-of-a-human-hair-and-passes/

Cool experiment that requires a ton of precision and error elimination. Seems like gravity continues to exist.
You don't get races of anything ... accept people.

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Offline Tom Bishop

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Re: Gravity’s smallest scale
« Reply #1 on: April 10, 2020, 06:07:00 PM »
Spoiler:

Quote
...This and many other experimental refinements have allowed them to measure gravitational attraction down to a distance of just 52µm. Once they add additional stabilization against vibration, they will be able to measure at even smaller separations. In the meantime, they have verified that the inverse-square law holds for distances shorter than 50µm, and therefore we have no New Physics™.
"The biggest problem in astronomy is that when we look at something in the sky, we don’t know how far away it is" — Pauline Barmby, Ph.D., Professor of Astronomy

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Offline stack

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Re: Gravity’s smallest scale
« Reply #2 on: April 10, 2020, 06:46:28 PM »
Spoiler:

Quote
...This and many other experimental refinements have allowed them to measure gravitational attraction down to a distance of just 52µm. Once they add additional stabilization against vibration, they will be able to measure at even smaller separations. In the meantime, they have verified that the inverse-square law holds for distances shorter than 50µm, and therefore we have no New Physics™.

What's the spoiler? That this level of precision in measuring the existence of gravity didn't reveal another dimension? It doesn't change the fact that we can measure gravity with ever increasing precision.
Not much is known about the celestial bodies and their distances.

Re: Gravity’s smallest scale
« Reply #3 on: May 21, 2020, 07:39:00 PM »
I am sucky at math and physics, so bear with me.

In that very interesting article, it reads "However, if the universe has more than three spatial dimensions, the inverse-square law would break." 

Is an alternative possibility that there are more spatial dimensions but that gravity only acts on three of them?  Or is that too non-sensical? 


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Offline Stagiri

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Re: Gravity’s smallest scale
« Reply #4 on: May 27, 2020, 08:01:02 PM »
(...)
Is an alternative possibility that there are more spatial dimensions but that gravity only acts on three of them?  Or is that too non-sensical?

Yes, that could be a totally possible alternative.
Dr Rowbotham was accurate in his experiments.
How do you know without repeating them?
Because they don't need to be repeated, they were correct.