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In physics, the Ives–Stilwell experiment tested the contribution of relativistic time dilation to the Doppler shift of light. [1] [2] The result was in agreement with the formula for the transverse Doppler effect and was the first direct, quantitative confirmation of the time dilation factor. Since then many Ives–Stilwell type experiments ...
A much more precise experiment of this kind was conducted by David H. Frisch and Smith (1962) and documented by a film. [8] They measured approximately 563 muons per hour in six runs on Mount Washington at 1917m above sea-level. By measuring their kinetic energy, mean muon velocities between 0.995 c and 0.9954 c were determined.
An experiment to test the theory of relativity cannot assume the theory is true, and therefore needs some other framework of assumptions that are wider than those of relativity. For example, a test theory may have a different postulate about light concerning one-way speed of light vs. two-way speed of light, it may have a preferred frame of ...
The transverse Doppler effect and consequently time dilation was directly observed for the first time in the Ives–Stilwell experiment (1938). In modern Ives-Stilwell experiments in heavy ion storage rings using saturated spectroscopy, the maximum measured deviation of time dilation from the relativistic prediction has been limited to ≤ 10 −8.
The difference that Ives and Stilwell measured corresponded, within experimental limits, to the effect predicted by special relativity. [p 7] Various of the subsequent repetitions of the Ives and Stilwell experiment have adopted other strategies for measuring the mean of blueshifted and redshifted particle beam emissions.
He is best known for the 1938 Ives–Stilwell experiment, which provided direct confirmation of special relativity's time dilation, [2] although Ives himself did not accept special relativity, and argued instead for an alternative interpretation of the experimental results. [3]
Ives–Stilwell experiment: Herbert E. Ives and G. R. Stilwell Confirmation Relativistic Doppler shift: 1942 Chicago Pile-1: Enrico Fermi: Demonstration First self-sustaining nuclear chain reaction: 1945 Trinity: Manhattan Project: Demonstration First nuclear weapon detonation 1947 Lamb–Retherford experiment: Willis Lamb and Robert Retherford ...
1935 – the Hammar experiment is another refutation of aether drag and evidence for special relativity. [33] [34] 1938 – Ives–Stilwell experiment measures time dilation via the relativistic Doppler effect. [35] For the first time, the Lorentz transformations can be derived directly from empirical data, as would be noticed by Robertson in 1949.