Equivalence Principle precision

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SUMMARY

This discussion focuses on the precision of experiments investigating the Equivalence Principle, specifically comparing two tables from Wikipedia. The first table presents dimensionless percentages known as the Eötvös parameter, while the second table provides values in GeV, which can also be interpreted as percentages when considering the mass of protons and neutrons. The user seeks clarification on how to convert the second table's values into ratios, questioning whether division by c² is the correct approach. The conversation highlights the need for a clear understanding of unit conversions in experimental physics.

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jumpjack
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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?
 
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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?
 

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