Equivalence Principle precision

AI Thread Summary
The discussion focuses on comparing two tables related to the Equivalence Principle, specifically their precision in experimental results. The first table presents dimensionless percentages known as the Eötvös parameter, while the second table uses values expressed in GeV, which can also be interpreted as percentages when considering the mass of protons and neutrons. To convert the second table values into ratios, one needs to divide by the mass of the relevant particle, such as the electron, to express them in percentage terms. There is confusion regarding the appropriate unit of measure for the first table and how to effectively compare it with the second. Understanding these conversions is crucial for accurate analysis of the experimental data.
jumpjack
Messages
223
Reaction score
3
I found 2 tables describing raising precision in experiments performed to investigate Equivalence Principle:
http://en.wikipedia.org/wiki/Equivalence_principle#Tests_of_the_weak_equivalence_principle
http://en.wikipedia.org/wiki/Hughes–Drever_experiment#Modern_experiments

I can't understand how to compare the two tables: is that possible? If second one is expressed in GeV, in which unit of measure is the first expressed? Is it just an adimensional ratio?
 
Physics news on Phys.org
Numbers in the first table are dimensionless percentages, what he calls the Eotvos parameter.
Numbers in the second table give a fraction of a GeV, but since the mass of protons and neutrons is approximately a GeV, they may be regarded as percentages too. For the electron column you'll have to divide by the electron mass to get a percentage.
 
Sorry but I can't yet understand.
How can I convert second table values into ratios? By dividing by c^2?
 
Thread 'Question about pressure of a liquid'

Thread 'Question about pressure of a liquid'

I am looking at pressure in liquids and I am testing my idea. The vertical tube is 100m, the contraption is filled with water. The vertical tube is very thin(maybe 1mm^2 cross section). The area of the base is ~100m^2. Will he top half be launched in the air if suddenly it cracked?- assuming its light enough. I want to test my idea that if I had a thin long ruber tube that I lifted up, then the pressure at "red lines" will be high and that the $force = pressure * area$ would be massive...
View full post »

Thread 'Why is the 3 body problem unsolvable? And what will happen if someone solves it?'

I feel it should be solvable we just need to find a perfect pattern, and there will be a general pattern since the forces acting are based on a single function, so..... you can't actually say it is unsolvable right? Cause imaging 3 bodies actually existed somwhere in this universe then nature isn't gonna wait till we predict it! And yea I have checked in many places that tiny changes cause large changes so it becomes chaos........ but still I just can't accept that it is impossible to solve...
View full post »

Similar threads

Finding the Equivalence Ratio of Combustion (Methane + Air)
Replies
9
Views
7K
Huygens principle consequence of isotropy
Replies
3
Views
2K
B Implicit error margins based on significant figures
Replies
18
Views
2K
I Black Hole Fire Walls, Brick Walls, and the Casimir Effect
Replies
6
Views
2K
Equivalence classes of proper classes
Replies
10
Views
4K
I Does the New Muon g-2 Measurement Indicate Physics Beyond the Standard Model?
Replies
2
Views
2K
I New Constraints On The Higgs Boson Width
Replies
11
Views
3K
Why is the Principle of Equivalence considered a theorem?
Replies
15
Views
4K
Is Alan Turing given too much credit when it comes to computers?
Replies
29
Views
5K
Does a charged particle in free fall radiate?
Replies
4
Views
4K

Hot Threads

Recent Insights

Back
Top