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Galileo’s demonstration, whether or not it happened at Pisa the way the legend has it, made a claim simple enough to falsify with two objects and a stopwatch: drop anything, and it falls at the same rate as anything else, mass cancelling out of the problem entirely. Loránd Eötvös turned the claim into a number in the early twentieth century, using a torsion balance to compare the gravitational and inertial mass of different materials to a precision of roughly one part in 10^{9} , hanging two different substances from a fibre and looking for the tiny twist that would appear if the Earth’s pull and the Earth’s rotation disagreed, even slightly, about which way each material’s weight should…
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Equation 1 · Quantum Relativity
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Galileo’s demonstration, whether or not it happened at Pisa the way the legend has it, made a claim simple enough to falsify with two objects and a stopwatch: drop anything, and it falls at the same rate as anything else, mass cancelling out of the problem entirely. Loránd Eötvös turned the claim into a number in the early twentieth century, using a torsion balance to compare the gravitational and inertial mass of different materials to a precision of roughly one part in 10^{9} , hanging two different substances from a fibre and looking for the tiny twist that would appear if the Earth’s pull and the Earth’s rotation disagreed, even slightly, about which way each material’s weight should…
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